A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

Symbolic attempt to overcome the issues of life.

Along this stretch of Indiana roadway resides a giant insect composed entirely of scrap metal.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

For over 100 years, this Indiana town has had a tree growing out the top of the local courthouse.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

Home to the deepest rift anywhere on Earth.

This museum glorifies the humble potato.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

This pop-culture shop also offers the chance to become part of their favorite tv show or movie.

After this former brothel closed, its interior remained almost frozen in time.