Research shows Americans are increasingly fretting about disasters — and even the end times. Hiding in a cave might actually protect you.

For millennia, people have lived in cave dwellings around the world. Though few are still inhabited, most are open to tourists. Other areas have been preserved as heritage sites for visitors as well.

In 1995, Grant Johnson purchased 40 acres of land and used dynamite to blast a cave in a boulder. He spent years shaping the walls by hand to create his dream home and moved in in 2014. Now he rents ...

Here’s how to plan a trip to Mammoth Cave National Park.