News flash from Barcelona in the Daily Mail:
Travellers staying in Barcelona come from across the world to see the Catalan city's stunning architecture, but many will never have seen a hotel as outlandish as this.
Polish architects who dreamt up the Barcelona Rock - a 100m hostel made especially for climbers - say guests can get their night's sleep perched perilously on a rock ledge overlooking the Spanish city.
It may be something of a health and safety nightmare and is certainly not what most would consider hotel comfort.
But thankfully those intrepid enough to sleep under the stars 100m from the ground are harnessed to the rock ledge to prevent them rolling off in their sleep.
The unusual concept hostel created by UGO was made for the Barcelona 2011 Bohemian Hostel for Backpackers international competition.
Competition rules asked designers to create a 100 metre tall tower hostel that includes relaxation areas, stores, cafe and at the same time created a new city landmark.
Polish firm UGO now hope the Barcelona Rock will become a 'unique place' in the Spanish city
It's hoped the structure would become a natural feature of historic importance in the centre of the metropolis.
He added: 'There's a swimming pool, spa, gym, cinema, pub, shops and climbing walls for beginners.
'The outer elevation of the hotel forms climbing walls for more advanced climbers, who can spend the night there using special equipment.
'We hope the hostel will become a symbol of the city as Ayers Rock is for Australia.