The first incarnation of this hotel was a zero-star offering in an underground nuclear bunker, but its second has more stars than any other in the world.

This summer the Null Stern Hotel, holiday accommodation in art form, opens its only room, without walls or a ceiling, beneath the night sky on a mountain-side in Graubünden in Switzerland. In 2008 it was in a bunker in St Gallen.

grau2-ZERO_STAR_HOTEL_Landv-largeThe double “room“, bookable on a seasonal basis from CHF200 (£154) per night, is the brainchild of conceptual artists Frank and Patrik Riklin and hospitality professional Daniel Charbonnier, who hope is will be the first of many across Switzerland that will showcase the country’s landscapes.

“Even though this version is radically different from the first one in the nuclear bunker, the essence and the spirit of the concept remains the same,” said Charbonnier. “To put the guest at the centre of the experience and to focus on the intangible by reducing everything else to the minimum.”

He added that Switzerland “will be the first country to become a hotel”.

grau5-ZERO_STAR_HOTEL_Landv-largeAnd that hotel comes with a butler, replete with white gloves and a bow tie, to ensure each guest receive a warm welcome, though they might need a little more in the way of warmth with thunderstorms forecast next week for the region where the bed is, Safiental. However, reservations can be cancelled at short notice due to poor weather.

grau7-ZERO_STAR_HOTEL_Moder-largeThe butler will also be on hand to serve warming shots of Röteli and cuts of saucisson.

There is no bathroom, as such, but guests are able to use facilities at a public bathroom 10 minutes from the bed.