Checked In Beneath the Ice

Europa's crust is kilometers of ice laid over a sea older than the Sun, and the Ice Crystal Resort is carved right into it. The walls here aren't built so much as melted into shape and left to refreeze around you.

The signature suite sits below the waterline-that-isn't-water, where the floor turns translucent and the glow of the subsurface ocean ripples up through your slippers. Jupiter hangs overhead like weather that never quite arrives.

Spa staff recommend the “thermal contrast” ritual, which is a polite way of saying you'll be very cold and then very smug about it. The bragging rights, mercifully, refreeze instantly. They keep.