I’ve been fascinated with the underground town of Coober Pedy, in Australia, b/c it’s the Opal mining capital of the world, and my birthstone is the Opal. Plus, it’s a very interesting place.
B/c it’s so hot, 80% of the town is underground. You can buy an above-ground house, if you really want one, but all homes are relatively inexpensive.
Shopping is underground.
Bars, coffee shops, & restaurants are also underground.
Churches are underground, too.
You can visit & stay in one of the many motels. This is the lobby of a Comfort Inn.