Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

When flour explodes, it's not a pretty sight.

The only arched bridge made of stone on the entire Mississippi River.

A Perpetually Under construction Park.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

The land is home to swimming ponies and a legendary 18th-century treasure.

Three columns of volcanic rock shoot out of the ocean.

This stunning concert hall has become a symbol of Iceland's national recovery.

The remnants of a wooden-hulled fleet built and abandoned in WWI, now home to a thriving ecosystem.

This beautiful, historic church looks like something out of a simpler past.

Three prestigious academic collections come together to create a world-class natural history museum.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

Walk in the footsteps of the gods and straddle two tectonic plates.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Learn about Iceland's hidden folk at this school dedicated to the study of elves.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.