A magnificent waterfall nestled in the heart of the El Yunque National Forest.

This 11th century tower is said to be the oldest building in Oxford.

One of Europe's oldest libraries.

This hilarious English intersection is an automotive whirlpool.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Europe's largest prehistoric mound – burial site of a legendary king?

The granddaddy of English geoglyphs dates back to the late Bronze Age.

Science meets wall art to highlight the beauty of famous mathematical equations.

A little sculpture with a large wardrobe.

Meet the bronze beloved pet to a family of famous peeing statues.

There aren't too many operational funiculars around, but Pittsburgh has two!

This massive airship factory is so large that it has its own indoor weather.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

The spectacular collection of one of the world's best woodcarvers.

These beautiful wineries were at the center of Lake Erie's "grape belt" back when the Midwest dominated American wine production.

Deep scars on the earth left by the Ice Age.

Learn about the history and craftsmanship of carousels inside this museum located in a former post office.

Ohio's 19th-century communist micro-society.

Mausoleums, astronomy, and animatronic dinosaurs at this memorial to an assassinated American president.

The 25th President's marble casket can be visited in this classical Ohio tomb.

A record-size collection of wild-haired troll dolls tells the story of the mythical creature's roots in Scandinavian folklore.

When a guy acquired a free church, he hauled it away piece-by-piece to make it the tasting hall at his vineyard.

For decades, this waterfall remained hidden because of an artificial dam.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.