This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

The famous author's cottage hideaway.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

This mesmerizingly colorful pond looks like a scene straight out of a fairytale.

Walk the whole Mississippi River!

A wealth of local folk art, antiques, and curios, without ever leaving your car.

The final resting place of the poets Shelley and Keats.

A 19th-century shrine covered with prosthetic body parts as votive offerings.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

America's oldest archaeological site or a muddled case of wishful thinking.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

From scholastic to sepulchral - now under reconstruction.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

Abandoned power station once home to a squatter community, now being developed into an arts center.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

An abandoned asylum where patients have been forgotten but their possessions remain.

One of the last free public hot springs is decorated with hippie art.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

An abandoned quicksilver mining town surrounded by the Big Bend parks.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

One of the world's largest collections of pathological specimens.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.