Four acres of tunnels, grotesque statues, and deliberate confusion. The man who built it started with a windbreak.
The Yorkshire Dales draws most people for its walking routes and market towns. The Forbidden Corner Yorkshire draws people who want to spend two hours being genuinely disoriented in a private garden that began as an accident.
Colin Armstrong planted windbreak trees on his Tupgill Park Estate in Coverdale in 1979. Ten years later, working with landscape designer Malcolm Tempest, he built a tower for his garden and then dug a chamber beneath it. The chamber became a tunnel. The tunnel connected to another chamber. By the time the digging stopped, a 4-acre folly of tunnels, statues, water traps and themed rooms occupied a corner of the estate that nobody had planned. On 23 July 1994, Armstrong opened it. Around 100 people came on the first day.
The Folly Fellowship later voted it the best European folly of the twentieth century.
Region: North Yorkshire / Yorkshire Dales
Best for: Families, unusual places, outdoor adventure, adults who enjoy being confused
Getting there: Tupgill Park Estate, Coverham, Middleham, Leyburn DL8 4TJ. By car from Middleham: 3 miles south-west via Coverham Lane. No public transport to the site; Middleham is the nearest town with bus connections.
Time needed: Two to three hours inside. Allow extra on busy summer days when underground sections fill.
What Is the Forbidden Corner, Yorkshire?
The Forbidden Corner is a 4-acre private garden on the Tupgill Park Estate in Coverdale, built and still owned by Colin Armstrong. It is not a theme park, not a heritage site, and not a conventional garden. It is a labyrinth of tunnels, chambers, passages, grotesque stone figures, water traps, mirrors and optical illusions designed specifically to disorient visitors.
Every entrance is a false entrance. Paths lead nowhere or loop back on themselves. Statues appear from unexpected angles. Dark tunnels open onto lit chambers. Water jets fire without warning. A door that looks like the exit opens onto a wall.
The whole thing covers four acres, but the compressed network of paths and chambers makes it feel larger. Groups that enter together regularly lose each other within the first twenty minutes. That is part of the design.
It takes roughly two to three hours to work through the main sections, longer if you try to find every chamber. No two visits produce the same route.
From Windbreak to 25-Foot Labyrinth
Armstrong planted the trees in 1979 as a practical windbreak for the estate. They established well. Over the following decade, as the planting matured, Armstrong began thinking about what to do with the enclosed corner of land the trees had created.
In 1989, working with Malcolm Tempest, he built a tower. The tower required foundations. The foundations required excavation. Armstrong and Tempest, finding themselves standing in a substantial hole, decided to use it. They lined it, roofed sections of it, and connected it to a second chamber.
The project expanded outward and downward from there. By 1991, the original hole had become a 25-foot-deep underground complex. By 1992, the surrounding four acres were taking shape above it: garden paths, planted sections, statues commissioned from multiple sculptors, and an intricate network of chambers and passages connecting the whole site.
The July 1994 opening was low-key. Armstrong had not anticipated the level of interest the garden would attract. Within a few years, the Forbidden Corner had a national reputation. It remains privately owned and operates seasonally, with the estate closed entirely outside the main season.
Inside: The Structure of the Confusion
The Forbidden Corner does not announce its sections with signs. Part of the point is that you do not know where you are or what you are walking into.
The garden contains several distinct areas. The most-discussed is the Temple of the Underworld, which occupies the deep chamber system dug in 1989. The descent is not immediately obvious. Once inside, the chambers open onto one another in a seemingly random order. Carved figures and sculptural details occupy the walls. The light changes. Visitors who find their way out on the first attempt are in the minority.
Above ground, the garden moves through planted sections connected by paths that frequently appear to lead somewhere and do not. Statues occupy corners, window frames open onto other statues, and mirrors redirect views in ways that take a moment to process. Water features throughout the site include jets built into paths and stepping stones. Whether they fire at any given step is unpredictable.
The original tower Armstrong built in 1989 is accessible. The views from the top over Coverdale and the surrounding Dales landscape are one of the few moments of calm in an otherwise deliberately confusing visit.
Children process the Forbidden Corner differently from adults. Adults find the disorientation mildly unsettling. Children who carry fewer expectations about how gardens should work tend to move through them faster and enjoy them more. Groups of mixed ages usually find the children leading by the halfway point.
The Grotesque Statuary
The sculptural work throughout the site is not ornamental. It was commissioned specifically for the Forbidden Corner and designed to disturb rather than decorate.
Figures with exaggerated expressions line paths. Stone faces appear in walls at the wrong height. Oversized forms occupy chamber corners. The scale is frequently wrong: hands too large for bodies, heads positioned too close to the ground. The recurring effect is a figure that appears to be watching from a direction the visitor has just turned away from.
None of the major sculptural pieces is labelled. Armstrong has said in interviews that naming them would reduce them. The visitor’s interpretation becomes part of the experience. A figure that means something specific is less unsettling than one that does not.
The quality of the stonework varies across the site, partly because different sculptors contributed at different stages of the project. The older sections from the mid-1990s have a weathered quality that the post-2000 additions are still acquiring. Both are worth examining closely.
Visiting With Children
The Forbidden Corner’s reputation as a family destination is accurate, with conditions attached.
Children under four visit for free, but the site is not suitable for pushchairs. The underground sections are genuinely dark, and some passages are narrow. Children who are uncomfortable in enclosed spaces will struggle in the tunnel complex.
From around four years old upward, the garden tends to work well. The water jets, the statues and the disorientation read as a game rather than as a problem. Groups of children typically move through the site faster than adults and return to surface-level sections while the adults are still underground, trying to work out where they came in.
The pre-booking requirement is firm. The Forbidden Corner limits visitor numbers each day and regularly sells out on summer weekends. Tickets for July and August book weeks in advance. Arriving without a booking will not result in entry.
Where to Stay: The Priory, Middleham, is a boutique guesthouse with four rooms, located directly opposite Middleham Castle. Three of the four rooms and the self-catering Coach House are dog-friendly. Roll-top baths, power showers, and a full cooked breakfast from local ingredients. Book direct.
Worth Pairing With: Middleham and Coverdale
Middleham is three miles from the Forbidden Corner and merits the detour on its own. The town has a ruined castle that belonged to Richard III before he became king; he spent part of his teenage years there as a ward in the Earl of Warwick’s household. English Heritage manages the castle, and it is open to the public. Middleham is also a serious racehorse training centre, and strings of horses crossing to and from the gallops in the early morning are a regular sight on the approach roads.
The town belongs to the category of quiet market towns in North Yorkshire that justify a full day. Coverdale itself, the valley the estate occupies, is among the least-visited of the hidden dales in North Yorkshire. It is shorter and quieter than Swaledale or Wensleydale, with a single road through it and very few visitors who are not specifically there for the Forbidden Corner or the walking routes above Coverham.
For food and drink after the visit, the pubs and dining options in the Yorkshire Dales guide cover what is available in the wider area.
Practical Tips for the Forbidden Corner Yorkshire.
- Pre-booking is essential. Book at theforbiddencorner.co.uk. The site sells out regularly from late June through August, particularly on weekends.
- Season: 1 April to 4 November, then Sundays only through to Christmas. Monday to Saturday noon to 6pm; Sunday and bank holidays 10am to 6pm.
- Tickets: Adults £19, Seniors £18, Children (4-15) £17, Under 4 free, Family (2+2) £66.
- No dogs except registered guide dogs. Not suitable for pushchairs. The underground sections are not wheelchair accessible.
- Wear shoes you do not mind getting wet. Water jets are integral to the design, and the underground sections are damp in cooler months.
- Allow two to three hours minimum. Groups that rush miss significant sections of the underground complex.
- For walking in Coverdale before or after the visit, use the AllTrails app for routes in the dale and above Coverham village.
Responsible Visiting
The Forbidden Corner is a privately owned garden on a working estate. The access it offers is at Armstrong’s discretion. Treat the sculptures and stonework as you would find them; the site operates without security patrols and relies on visitors acting sensibly.
The surrounding Tupgill Park Estate is private land beyond the four-acre garden boundary. Stay within the permitted area.
Coverham Lane and the roads around the estate are narrow and carry farm traffic. Use the designated car park. Do not park in the lane.
Reader Q&A
Is the Forbidden Corner suitable for young children?
Children under four visit free of charge, but the site is not suitable for pushchairs, and the underground sections are dark and confined. From around four years old, the Forbidden Corner tends to work well as a family visit. Children who are uncomfortable in narrow spaces will find parts of the underground complex difficult, regardless of age.
Do you need to book the Forbidden Corner in advance?
Yes, pre-booking is essential. There is no walk-up entry, and the site sells out weeks in advance on summer weekends. Book at theforbiddencorner.co.uk. Turning up without a booking will not result in entry.
How long does the Forbidden Corner take?
Allow two to three hours for a thorough visit. The site is designed so that no two visits take the same route, and most visitors miss at least one section on a first pass. Groups trying to find every underground chamber often take longer.
Can you bring dogs to the Forbidden Corner?
No. Dogs are not permitted except registered guide dogs. This applies regardless of size and is strictly enforced at the entrance.
Where to Stay
The Priory, Middleham. A boutique guest house with four B&B rooms and a self-catering Coach House, set opposite Middleham Castle on West End, Middleham DL8 4QG. Three of the four rooms and the Coach House are dog-friendly. Rooms include roll-top or copper baths and large power showers. Full cooked breakfast using locally sourced ingredients, served at a time to suit you.
The Wensleydale Hotel, Middleham. A Grade II listed AA 4-star inn with The Tack Room Restaurant and Bar, at Market Place, Middleham DL8 4PE. The Tack Room holds an AA Rosette for culinary excellence. Castle view rooms available. Within easy reach of Coverdale and the Forbidden Corner.
Armstrong built the Forbidden Corner as a private garden for his estate, creating a place that people now travel across the country to visit. The confusion was always the attraction. Coverdale will not explain itself to you on the way in, and neither will the garden. Find more unusual follies, hidden places and extraordinary corners of Britain in our History category.
