The most powerful waterfall in all of Europe.

A spiritual vortex among the red rocks in Sedona.

Three columns of volcanic rock shoot out of the ocean.

Go inside to really appreciate this 500-year-old technological masterpiece.

This dark, quiet forest on the outskirts of San Diego is dense with rumor and lore.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Megachurch turned Catholic church comprised of 10,000 glass panes.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The drama of nature in full effect in this Nevada State Park.

Copenhagen's celebrated theme park and gardens.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A world-class observatory in the California desert.

This elegant arc of a waterfall marks a religious turning point.

The programmatic glory of LA's giant whiskey barrel building has become an upscale reminder of the city's kitschy roadside past.

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.

Quite simply the largest tree in the world (by volume).

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The hallucinogenic center of the ancient world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A reproduction of earth's many biomes.

Iceland's largest lagoon is home to stunning multi-colored icebergs.