Holiday website TripAdvisor is offering thrill-seekers an expedition to experience life on Mars —deep in the caves of northern Spain.

Devised by agency Astroland, the adventure involves spending three days and nights in the confines of Ares Station, a 196-ft high, 0.93 mile-long cave that’s situated deep in the Canatabrian mountains. There, the cave aims to accurately replicate the hostile conditions of Mars and is isolated from human contact. The first ‘mission’ has already taken place by a test ‘crew’, but now the agency is opening its doors to paying guests, with five expeditions held over coming months.

‘Stepping outside your comfort zone is one of the most exciting parts of travel, and for even the most adventurous, Astroland truly delivers,’ commented Laurel Greatrix of TripAdvisor.  ‘It’s a remarkable experience and we’re excited to be offering it.’