In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This little Greek plateau is home to thousands of rustic, white-sailed windmills.

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

This abandoned Greek island was the last active leper colony in Europe.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

This ingenious engineering solution was built to stop the "theft" of canal water.

The longest canal aqueduct in England was built without a plan to get water past the moving boats.

A unique flight of canal locks that owe their form to 19th-century cost-saving measures.

Make it an offering.

This old-fashioned roadhouse's quirky neon sign is as famous as its enormous dumplings.

Lighthouse-cum-columbarium where "Nor'easters" and grandma go to die.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The wooden airship was the largest flying boat ever built.

Home of Howard Hughes' Spruce Goose.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

This giant radio telescope would be a rusting ruin if it hadn't become such a beloved relic.

This Dutch windmill has its roots in an American invention.

An awe-inspiring giant blue whale jaw bone stands in the center of this Dutch island.

The nerve center of a massive, state-of-the art radio telescope that sprawls across Western Europe.