Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

This legendary urban waterfall creates a dazzling display of rainbows.

These ancient sacred grounds granted amnesty to those who managed to reach them.

The ruins of a cotton mill that was burned in the Civil War are still hidden in a Georgia forest.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

Uninhabited islet in the Caribbean is the sanctuary of giant lizards.

After just one epic test blast, this literal loose cannon proved too explosive for combat.

A white oak with property rights.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

360° views of the city plus five floors of optical illusions and hands-on science.

A psychedelic tribute to one of Georgia's most unique artistic visionaries, out of place and time in the heart of Atlanta.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

A natural arch offers panoramic views of Yangshuo's karst hills.

Peace Park and the Atomic Bomb Dome.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

This sprawling stronghold has been at the center of some of South India's bloodiest wars.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Perhaps the most scandalous statue of America's first president.

The picturesque southern city served as the zombie-filled town of Woodbury in 'The Walking Dead.'

It may look like no more than a full-scale model, but every part of this full Space Shuttle stack had a working role in aviation history.