One of only two pod-shaped homes designed by Frank Lloyd Wright.

This state park was once an important Native American cermonial center.

This historic crypt was said to have been designed and built by the very person who is buried inside of it.

This historic headstone is said to mark the final resting place of a doubly-dead white witch.

This fairytale-inspired cottage was created by a university literature professor.

One of the world’s largest and deepest freshwater springs, where mastodons once roamed.

This phone booth-sized municipal building has been a piece of police property for more than half a century.

This 15-foot former Johnny Appleseed has given up his apples for donuts and coffee.

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

The unique collection includes bronze cast handprints of some of America's most famous astronauts.

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

A circus legend leaves an unexpected endowment.

Found: Garden of Eden in Miami-Dade County, Florida.

The sign that drew attention to a young boy's cucumber stand is now the name of his fruit superstore.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

A historic presidential getaway on the continental United States' southernmost island.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Manatees congregate around a power plant's discharge canal where the water is especially warm.