Possibly the smallest church in the world floats in the middle of a pond.

A six-story treehouse offers spectacular views of New York's Finger Lakes region.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This former fire tower is now a rustic observatory that offers amazing views of eagles, hawks, and the Appalachian Mountains.

Once connected to the outside world by a single train track, this ghost town is looked after by the National Park Service.

In the mountains of West Virginia is this perfectly preserved Art Deco train station.

Bad farming practices caused this unnatural natural wonder.

Ruins of a Carnegie family mansion on Cumberland Island.

Despite being burnt down multiple times, the ruins of this South Carolina church are still standing.

An unfinished rail tunnel that has since been used to house cheese and bats.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

A historic dam made famous for its turbines and feature in a Hollywood classic.

The scant remains of this flooded historic village can be explored in one of the most remote areas of the Great Smokies.

The remains of the iconic train crash from the movie 'The Fugitive' can still be found rusting along the Great Smoky Railroad.

An abandoned relic of the city's failed experiment with below ground transit.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

These rows of World War II-era bunkers were the scene of some of the infamous Mothman sightings.

One of the few surviving examples of the first lock and dam system built on the Ohio River.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

There is beauty and history in the ruins of this former company town.

Small, privately owned island divided between Michigan and Ohio with abandoned vacation homes and a derelict lighthouse.

This abandoned bridge to nowhere stands secluded in the woods of a Cleveland suburb.