Raphael and Mirjam (R) pose as first guests in the bedroom of the Null-Stern-Hotel (Zero-star-hotel) land art installation by Swiss artists Frank and Patrik Riklin on an alp mount Saentis near Gonten, Switzerland June 1, 2017. Guests can order overnight stays in the Null-Stern-hotelroom with no walls and roof located on some 1,200 metres (3,937 ft) altitude in the eastern Swiss Alps. (Photo by Arnd Wiegmann/Reuters)
