A candle shop hiding a haunted basement once used as a monkey research lab.

Descend into the world’s longest-running deep anthracite coal mine.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

These boots are made for selfies.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

San Antonio's first 3-D stereoscopic mural is a trippy treat for the eyes.

A popular swimming hole that hides one of America's most deadly diving spots.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Locals dubbed it the "Owl Building" because of its bird-like appearance.

The world's largest squirrel statue clutches a pecan bigger than your head.

An immense cave that has served as an outlaw's treasure trove, an underground dance hall, a nuclear fallout shelter, and much more.

This small stone building, the final work of a renowned artist, offers a peaceful environment with radiant, colorful glass windows .

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

Free public park and gardens filled with peacocks and peahens.

This departure gate in Austin's airport sends travelers to over 120 imaginary destinations.

The world’s first penitentiary, meant to be humane, drove men insane.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A layered tribute to the work of mosaicist Isaiah Zagar.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

This lone tree and dramatic sandstone outcropping are so beloved by Michiganders they can be found on one of the state’s coins.

This was the first ever National Lakeshore, established in 1966.

Nine tiny mice sculptures hide in plain sight along Main Street.