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

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Elevated freight railway turned wildly successful urban park.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

Abandoned railway line circling the city of Paris.

France's most famous cemetery, with some of its most curious tombs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

What happens when you cross a mayor and a painter?

A naturally beautiful, seemingly bottomless deep blue spring.

This Nevada lake holds its titular natural pyramid and, if the legends are true, a number of dangerous spirits.

This quirky collection is an interactive exhibit crammed with creative contraptions and tinkered-with toys.

One of the world's steepest streets seems to have houses sliding down it.

The world's only complete colossal squid specimen is on display at the Te Papa Museum.

A perfect turquoise lake colored with glacier dust.

Dramatic river bend surrounds a natural red-rocked pedestal.

A musical instrument played by the sea.

A whimsical bridge adorned with decorative dragons.

Most-visited and most-photographed slot canyon in the American Southwest.

Once the home of a hermetic monk, this cave now houses a small church.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.