An ancient capital city that dates back 3,000 years old and harbors many surprises.

Towering basalt columns, a creation of fire and ice.

A beautiful geyser under environmental threat.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

The first declared National Monument in the United States.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

An enormous, inside-out glass globe built in 1935.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Rippling sand dunes frozen in the Arizona rock.

A huge musical instrument played by the ocean.

At this unusual park, domes, ladders, chairs, and more are made from trees.

It's good luck to be mocked by this monkey.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

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