The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Legends surround this jagged rock formation in the New Mexico desert.

An obscure waterfall that looks like something out of a fantasy novel.

This massive redwood tree has a hole in the base big enough to drive through.

This rare example of a "tidefall" is a spectacular drop from the cliffs down onto the beach.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

The largest permanent Monopoly board makes one of the longest games even bigger.

A natural gas leak provides a flickering flame beneath a waterfall.

Finale of "William Tell Overture" can be heard as drivers pass over grooves in the road.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

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

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

The Grand Canyon of Texas.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

This spectacular track has run continuously since 1882.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal 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.