Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

What remains of the summer palace of King Kamehameha III.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

A building so large that it has its own weather.

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

A sculpture of a giant hand reaches for the stars in the middle of the Atacama desert.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This former insane asylum now holds a pathological anatomy museum.

Legends surround an ancient tree trunk riddled with nails for good luck.

The final resting place for the remains of 143 Habsburg royalty.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Baroque celebration of the end of the Great Plague of Vienna.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

London's smallest police station is barely the size of a phone booth.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."