This historic collection of Native Alaskan artifacts was resurrected through a partnership between the WPA and tribal artisans.

The king of U.S. high points towers over every other peak on the continent.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This Danish rock field is actually a sprawling ancient cemetery holding the bodies of 700 Vikings.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A floundering Polish shipyard was once the soul of the Solidarity movement that capsized communism.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

The oldest Roman lighthouse still in use.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Every equinox this Maya pyramid puts on a spooky ancient light show.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Danish observation tower designed to look like a giant beer bottle.

Pluto is still considered a planet in Ithaca, New York.

Giant granite sculptures representing family on the northern coast of Spain.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Old Danish castle immortalized in Shakespeare's Hamlet.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

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

An abstract monument to a symphonic composer.

A subterranean house of worship carved right out of the bedrock.