The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

A man-made island in scenic San Francisco Bay.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

The world's biggest floating museum in Gothenburg, Sweden.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Structure built from the skulls of vanquished foes.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

This massive redwood tree has a hole in the base big enough to drive through.

A trash dump made beautiful by nature's power.

"We Seceded Where Others Failed."

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

First point in the Struve Geodetic Arc, a 19th century undertaking to measure the Earth's size and shape.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

It houses the remains of a 17th-century version of the Titanic.

A magical place that lets you play in and explore the world of Studio Ghibli.

Swedish skyscraper with a 90° twist.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Old Danish castle immortalized in Shakespeare's Hamlet.

Micro-nation based around a nine-story high illegally built tower.