One man's vision and a labor of love of many.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

A modern-day wunderkammer dedicated to Indianapolis history, Afrofuturism, and musical vibrations.

This mysterious hill seems to pull objects uphill.

Ornate limestone building now filled with geologic specimens, and more.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A medical facility that has been kept frozen in time.

A stunning, abandoned limestone quarry in southern Indiana provided the stone to erect the Empire State Building.

The longest navigable underground river in the United States is home to countless blind and albino animals.

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

Natural rock water slides hidden in the remote forests of northern Idaho.

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

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

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

A few dilapidated structures are all that remain of this deserted former silver mining town.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

Home to the deepest rift anywhere on Earth.

The final resting place of the living embodiment of the famous Forest Service symbol.

The building stands within a quiet, postcard-perfect New Mexico village.

At this research institute, the chile is king.