This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

A hotel and restaurant serving as the mecca of kitsch.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

An indoor miniature village and labor of love for Laurence Geiringer, a model railroad enthusiast.

A local prank turned town icon.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Mysterious rocks that ring musically when struck.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

Every equinox this Maya pyramid puts on a spooky ancient light show.

A psychedelic labyrinth on the San Francisco bay.

A way to take your secrets to someone else's grave.

A curious friendship between two inanimate ladies.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

Scattered around Atlanta are little doors with big charm.

A bizarre roadside attraction and the first instance of miniature golf in the world.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

Enormous lake at the bottom of a unique cave system.

This large cave is a summer home to thousands of bats and has a rich history dating back to prehistoric times.