In the summertime floats on the waters of the river Lule, in winter it is set in the ice. And from its rooms with huge windows to the ceiling, you can admire the sky without having to go out. The Arctic Bath hotel, designed by Bertil Harström and Johan Kauppi, is about to open in Sweden: it is the ideal place to enjoy the Northern Lights phenomenon, from October to March, or the midnight sun. There are only six rooms, set up on a circular structure that has a natural pool with very cold water inside. The inevitable wellness center has twelve cabins for massages, thermal baths and crystal treatments. A structure that, as the designers wanted, has the least possible impact on the environment.

Who loves to immerse themselves in nature, always in Sweden, can also choose the Treehotel, with its own rooms in glass, bird's nest, Ufo-shaped, suspended among the tall trees in the pine forests of the northern part of the country, with a panoramic view of the river.

The rooms of the Free Spirits Hotel in Canada are real spheres in the trees of the rainforest coastal Vancouver Island, British Columbia: a unique hotel, where you can seek peace and relaxation by doing glamping, a new type of camping, between green and luxury. Or from which to go to discover the natural wonders that the island offers.

In the Sacred Valley of the Incas, in Peru, the Skylodges Adventure Suits allow you to sleep suspended in a transparent capsule at 300 meters of height (but with all the comforts), for a breathtaking experience where the condors fly.

And in Italy? In the Renon (Bolzano), the Adler Lodge Ritten is a cozy retreat in the forest, among fragrant trees, Spa in the woods and lakeside chalets. It was opened in late June. There is the possibility of reach the structure with the cable car starting from the center of Bolzano. Guests arriving by foot from the forest to the plateau face a large clearing overlooking the entrance of the central structure, all covered in black wood. Around, 20 chalets (some on the shore of a natural pond) with large windows, sauna and fireplace.

In Friuli Venezia Giulia, in Claut Valcellina, stands the Tree Village, a veritable small village of small houses built on trees without damaging them. The structure provides sleeping bags: each cottage can accommodate 2 to 6 people.

Never slept in a cave? In Matera Sextantio le Grotte della Civita is a widespread hotel, of which they are part well 18 caves carved into the tufa rock, to relive the feelings of the families who lived there until the fifties.