The remains of a massive blast furnace in what was once one of the country's largest iron-producing regions.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

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

An abandoned asylum incorporated into a college campus.

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

Thousands of jack o'lanterns light up Halloween at this historic West Virginia home.

An enormous goose sits atop this nest-shaped home.

Origin of the blue-skinned Fugates of eastern Kentucky.

Beautiful waterfalls grace a canyon visibly torn by a violent tornado.

How did a massive marine arthropod find its way to landlocked Ohio?

The largest earthwork effigy in the world.

A castle built by an eccentric medieval enthusiast in suburban Ohio.

The museum calls itself the "National Museum of the Paranormal" and is full of eerie oddities.

A museum honoring Germany’s cucumber mecca offers a great dill of gherkin history.

Two insane asylum bodies embalmed by an amateur.

From Coke II to Google Glass, this exhibit features some of the most spectacular commercial flops.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

The cedar tree in Highgate Cemetery earned its title by accident.

The remains of a British railway rusting in the jungle mist of a Brazilian mountainside.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The jewel of western Mexico's archaeological legacy is this tiered circular pyramid now covered in grass.