The world's tallest bridge is also possibly the most elegant.

This massive swimming pool is the high tech home to the human-powered submarine races.

The bridge's highly-contested plaque (once again) honors Confederate President Jefferson Davis.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

Local lore says the devil built this beautiful medieval bridge to help a fleeing bandit.

The largest brick bridge in the world.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The span is crooked and made from two older recycled bridges.

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

Built by the patriotic residents of Boonsboro in a single day.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

Sacred waters rescued from the wrath of a volcano.

Bridge that died in war and was resurected.

Tubing through a cave lit with glowworms is a magical underground experience.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

It's always summer at the beach inside this former airship hangar.

The largest and, arguably, most scenic fortress in Bhutan.

A network of hundreds of interconnected wineries in caves hides under the town center.

This collection of Japanese luck idols beckons visitors with over 2,000 waving paws.

This magnificent Cincinnati graveyard is also a popular public park.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.