This ghostly Alaska village still clings to a steep cliffside despite having been abandoned for over 50 years.

One of Alaska's most significant ancient sites, spanning millennia and cultures, is right under the feet of some famously fat bears.

Gorgeous cave resemble a winter wonderland.

The ghostly remains of what was once the world's richest copper mine.

At 238 feet above the bottom of a gorge this span is known as the biggest thrill on the road to McCarthy.

An auroral research program that superheats the ionosphere.

One-layer pyramid in Indiana.

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

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

Tucked away in the forests of Indiana resides an abandoned waterslide that is now a popular graffiti haunt.

One tree's homage to soles past and present.

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

If astronomy had a ghost, it would look like this observatory.

A set of tall pillars and alcove-like rooms that are significant to the Miami people of Indiana.

Where hikers on the Tecumseh Trail can exchange a dirty sock for a free geode.

The overgrown remains of one of the premier auto-racing speedways in the Midwest—and also one of the most deadly.

This mysterious hill seems to pull objects uphill.

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

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

Nature and art meet in this curvy creation

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

The final resting place of the world's first nuclear reactor.

One of the few authentic Japanese gardens in the state of Indiana and perhaps the most peaceful place in the city of Mishawaka.

A rural hall of justice holds the world's only comic book and superhero museum.