A house with an “extensive” network of tunnels, rooms and a railway more than 50ft (15m) underground has been sold at auction for £375,000.
The property in Long Lane, Tilehurst, was inspired by Tracy Island, the secret headquarters featured in 1960s TV series Thunderbirds.
Beginning more than two decades ago, the tunnels were the passion-project of civil engineer Tony Deane.
The site also features a garden, swimming pool, workshop and a model space rocket in the garden measuring at about 23ft (7m) tall.
There are now plans to convert the 2,500 sq ft (232.2 sq m) workshop, which spans three floors, into a three-bedroom house.
Richard Worrall, auctioneer and consultant at BTG Eddisons Property Auctions, said: “It represents a really unique opportunity for somebody to either develop it or to live there and enjoy it.
“To say it’s a workshop is doing it down a little bit, it’s constructed better than 95% of houses, to be honest.”
