A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.

A whale of a public art display towers atop Juneau's cruise ship dock.

These sacred Mesoamerican ruins feature peculiar petroglyphs hidden in the stones.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

A self-built castle made by a mysterious man.

The word "Watergate" will forever be associated with the infamous scandal in 1972, but this fountain is famous in its own right.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

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

Medicinal spa created with the discharge from a geothermal energy plant.

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

The first blast furnace in the United States that used coal and coke fuel instead of charcoal to make pig iron.

The romance of early commercial flight still fills this Art Deco destination.

The oldest continuously operating fish market in the United States.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

An abstract monument to a symphonic composer.

This imposing memorial contains the remains of Che Guevara — and 29 other guerrillas who died with him in Bolivia.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

Romans built the world's tallest artificial waterfall in 271 BC.

Erotic art covers the walls of the largest ancient pleasure palace.