The tomb of history's greatest potato promoter is surrounded by tubers.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

Possibly the world's largest coin stands just outside of a Canadian science center.

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

A school teacher's massive and terrifying self-built castle.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A once grand hotel is being retaken by the wilderness it once capitalized on.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

This island castle contains enough secret passageways to support a season of Scooby-Doo episodes.

Two bronze wolves atop this large rock honor the "Wolves of Tuscany" brigade of World War I.

The first geometric self-supporting spiral stairs in Britain are a truly beautiful sight.

Hidden amid the tropical forest in the Caribbean Sea are the decaying ruins of the Cocaine King's luxurious island party home.

A dangling church built over a Colombian gorge.

A whimsical bridge adorned with decorative dragons.

This abandoned Slovenian military barracks has become a punky-political art squat.

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

Inside this wonderland of weird, visitors are treated to a collection ranging from skeletons to haunted artifacts.

Hidden amid the old-world charm of Savannah is a museum dedicated to the world of oddities and criminal history.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This whimsical fountain pays tribute to Toronto's four-legged friends.

A large circus museum with summer performances.

One of Antoni Gaudí's least-visited works, an homage to Catalan patrimony that mixes neo-Gothic with Modernista forms.