An abandoned mine in Kentucky, in the US, has been turned into the largest indoor bike park in the country.
The mine, in Louisville, is part of the wider Louisville Mega Cavern, parts of which have already been transformed into a business park, according to AP.
The bike park runs over half a kilometer, with mine co-owner Tom Tyler saying the old mine had a great layout for the bike park and 'plenty of dirt to spare'.
This is not the first time an old abandoned mine has been ingeniously transformed.
In Wales a 176 year old mine has been turned into an "underground trampoline wonderland" and disco.
In Belgium a former coal mine has been reborn as a modernist community space, with high schools, movie theatres and hiking tracks taking the place of old mining infrastructure, while in Romania the former Salina Turda salt mine has been turned into a living museum that runs over three levels and even features a Ferris Wheel.
Others have been turned into wine cellars and cheese aging facilities.
Image: AP/Dylan Love