This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

Dramatic river bend surrounds a natural red-rocked pedestal.

Most-visited and most-photographed slot canyon in the American Southwest.

Rippling sand dunes frozen in the Arizona rock.

Famous for its bio-luminescent inhabitants, known as "dismalites."

A wealth of local folk art, antiques, and curios, without ever leaving your car.

A former taxidermist has turned his old shop into a folk art mecca.

148 feet long and in the middle of a verdant forest.

The ghostly remains of what was once the world's richest copper mine.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

The king of U.S. high points towers over every other peak on the continent.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

These aggressively sustainable art homes look like something out of 1970's science fiction.

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A clear blue swimming hole with hidden caves, still unexplored.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

One man has carved a number of natural New Mexico caves into psychedelic sandstone temples.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

This sweet Southern elixir comes from what may be the oldest grape vine in North America.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

An all-female order shares an ancient culinary art with visitors at their mountaintop monastery.