16. Takaragawa Onsen—Osenkaku, Japan
Okay, so you’ll have to cross half the planet to get to Osenkaku, Japan, but once you’re there you can stay as long as you want. They offer several room styles. They also have different pools, accounting for gender-specific and mixed-gender accommodations. The place is huge, and yet somehow surrounded by lush Japanese serenity. Takaragawa Onsen has been a destination for so long, few know when it was first visited by ancestral humans.
