Slough Caverns

Useful Information

Location: Slough, Wellington Street, Tesco parking lot. West of London
Open: not yet open [2006]
Fee: not yet open [2006]
Classification: SpeleologyKarst cave SmileVirtual Cave
Light: LightIncandescent Electric Light System
Dimension: L=193,121 m, VR=1,700 m.
Guided tours:  
Address: The Petrol Station, c/o Tesco Stores, Brunel Way, Wellington Street, Slough, SL1 1XW. E-mail: contact
As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
Please check rates and details directly with the companies in question if you need more recent info.


03-NOV-2005 discovered by Micheal Fink of Balfour Beatty contractors.
APR-2008 scheduled inauguration of the new show cave.


Slough Cavern is a very recent discovery, made in 2005 during the construction of a new Tesco Magastore. It was discovered by Micheal Fink of Balfour Beatty while breaking the ground with a hydraulic chisel. The new discovery was soon explored and until now an extensive, and also very deep, cave system was discovered.

Covering only an area of about 13 km² around Slough, between Burnham, Windsor and the M25 motorway, the cave has an extraordinary size of 193 km. This makes it the longest cave of Europe, slightly longer than the Hölloch in Switzerland. Most of the cave is located at a depth of about 1,600 m, only very few branches reach the surface.

This is a SmileVirtual Cave! Do not try to visit!