Denmark’s never-ending bridge.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

An actual 1957 Cadillac De Ville, encased in 15 cubic yards of concrete.

The world's biggest version of the popular Swedish souvenir.

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

Where a railroad loops under or over itself to rise or drop more than 70 feet in a short distance.

Spend the night in this formerly abandoned traditional Scottish village.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

An architect transformed this abandoned cement factory into his castle-like workshop.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

This beautiful "lagoon" is actually a toxic soup filled with cars, carcasses, and trash. When warnings couldn't stop people from going for a dip, the town dyed it black.

A fiery crater has been burning in the Karakum Desert since 1971.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

A series of sculptures beneath the waves promote ocean conservation and support coral reefs.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

A disconnected rotary phone for "calling" lost loved ones offered a unique way of dealing with grief in disaster-stricken Japan.

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

The now-abandoned tunnels were built for the transcontinental railroad on the route where the first wagon train entered California.

Get past the gatekeeper's apartment and enter an elaborate hoax of a restaurant with a Masonic feel.

A flight of this "ghost staircase" has 40 steps on the way up, but only 39 steps on the way down.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

The oldest continuously operating pharmacy in Europe.