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

The second largest waterfall by volume in the U.S., Willamette Falls is outdone only by Niagara in the amount of water that is pushed northward.

Eons old volcanic activity created one of the most stunning rock formations in the United States.

Carved by a waterfall in a hard-to-reach rock formation, this heart-shaped rock has inspired romantics for decades.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

Historic funicular railway, believed to be the shortest railroad in the world.

The highest bridge in America was built for an almost unnervingly small amount of money.

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

Less a museum than a bizarre fantasy world created by artists and engineers.

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

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

The magic's in the hole!

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

Towering basalt columns, a creation of fire and ice.

Hollowed out cedar log tubs set in an ancient towering forest.

A heavenly experience, right here on Terra Firma.

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

Strange red rock formations that have been attributed to a higher power for hundreds of years.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

A beautiful geyser under environmental threat.

The world's longest known cave system.