What remains of the summer palace of King Kamehameha III.

A 1940's shrine dedicated to drowned fishermen on the outskirts of Honolulu.

A unique set of caves that spits waves back out into the ocean.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

Oldest building in California still in use.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

What happens here stays here – unless it affects the whole world.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

The narrowest street in Canada was once a spot for dastardly doings, now a historic piece of Chinatown.

One artist's yard is full of shining, whirling kinetic sculptures that look like pure steel psychedelia.

A building so large that it has its own weather.

In Washington's Yakima Valley lies a town "where dinosaurs roam."

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The first declared National Monument in the United States.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

Record-holding guitar meant to promote country.

Come for the flowers, stay for the bats!

A giant Australian fruit and tropical farm.

Roadside display for a popular fruit and vegetable stand.

One of the first big sculptures anywhere in Australia.