A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

You might recognize this historic Oregon mansion from its appearance in 'The Goonies.'

This incongruous small ferry across the Willamette River north of Salem, Oregon has been operating continuously since the 1850s.

A Victorian-style home known as the “Castle on the Hill.”

An old World War II hangar holds 20 vintage aircraft and the rare opportunity to take a ride in a 1940s warbird.

Home to the only outdoor municipal elevator in the United States.

The wooden airship was the largest flying boat ever built.

Entering this curiosity shop is like stepping into a mad scientist's lab.

Nestled between a college and a golf course, the garden is home to more than 2,500 rhododendrons.

An institution that preserves the history of institutionalization.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

Two stunning 17th-century libraries and a cabinet of curiosities.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

The seamy, underground secrets of Portland's criminal past.

A heavenly experience, right here on Terra Firma.

A beautiful 62-acre Catholic shrine and botanical garden.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

All of Chicago's wood-paved streets are long gone but two alleys remain.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A dangling church built over a Colombian gorge.