Cave lovers are being given the chance to snap up a set for £150,000 which includes a seven-mile underground network. The five limestone caves are hidden away under 2.5 acres of woodland in Wales.
While they'd be ideal for someone who loves to explore caves they could also be turned into an underground home if the new owner is granted planning permission.
It's located at the foot of the Great Forest hills in the Brecon Beacons national park and dates back half a million years. The current owner of the site is a local farmer who has put it up for sale which through Rightmove.
Experts say it could as a private property or be utilised for commercial purposes so could offer outdoor activities for nature fans.
Read more on mirror.co.uk