Rare recess caves fill this unbelievably beautiful Ohio park.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

A meditative space out of a fantasy story.

An abandoned stretch of highway, deteriorating next to the operational one.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

An abandoned castle owned and ignored by Masons carries a cursed history.

Experience park where visitors are told to expect the unexpected.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

This grand gothic brewery has been pumping out suds for over a hundred years.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

Quite simply the largest tree in the world (by volume).

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

A haunting collection of the vanished and disappearing natural world.

San Francisco's newly reopened hands-on science museum.

This lab's maddening silence is good for business but bad for sanity.

Eighty million natural history specimens call this gargantuan museum home.