Setouchi Aonagi Hotel
Located in the booming Matsuyama region of Japan, the Setouchi Aonagi Hotel is often notable for what it lacks. Designed by Tadao Ando, the property was formerly an art museum, but now holds a total of seven guestrooms, each offering a minimalist vibe that's seen the removal of all unnecessary elements. The grounds are also home to two pools — one of which juts out towards the sea — a hot spring jacuzzi, a sauna, a spa, a gallery, and a restaurant serving seasonal ingredients from the region. Plentiful glass lets you take in the views of both the water and the impressive concrete architecture.