Dramatic river bend surrounds a natural red-rocked pedestal.

This rustic old building is said to be the most photographed barn in America.

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

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

This beautifully verdant lagoon is tucked below a massive volcano in a crater atop a black pebble beach.

On La Gomera, "Silbadors" communicate in a 4,000-word language of whistles.

This local emblem is the oldest and largest dragon tree in the Canary Islands.

This public elevator links the lower city to the upper city of Salvador.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

Deep below the dry landscape of Bahia, a cave with intense blue water to float in.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

Abandoned substation turned village treasure.

This incredible stone temple is a monument to death, victory, and fantasy architecture.

Ruins of a German Castle on top of a towering stone pillar.

A man-made slag heap that you can "ski" down, and is home to the world sandboarding championships.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

The telescope that discovered Neptune.

The footprint of a frustrated devil in Munich's Cathedral.

The prototype for all Nazi concentration camps.