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

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

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

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

This century old flensing port is a remnant of a culture for whom whaling is still legal.

Adobe ruins punctuate the beauty of an 800 foot canyon carved by the Canadian River.

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

This crumbling Death Valley mining complex was known for its use of giant, 20-mule team wagons.

The ruins of a Duke's bucolic dream, where camels once roamed alongside "Dutch" windmills and faux-Italian vineyards.

A complicated, forgotten beacon of hope for thousands of immigrants, "Canada's Emerald Isle" lies in ruin.

All that remains of this Massachusetts town, demolished in the name of progress, is a stone marker.

Georgia's first brewery is also one of its oldest surviving buildings.

This historic national park is covered in the stunning ruins of red rock pueblos.

Friction between grains of sand cause a curious "singing" sound.

Doris Duke's lasting collection of Islamic Art, hidden in a Hawaiian paradise.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

This ancient Hawaiian henge may have been an early star chart.

What remains of the summer palace of King Kamehameha III.

A little known pile of scraps and plaques mark the grave of a downed RAF bomber.

The stunning remnants of this wreck emerge from an otherworldly backdrop of rainforests.

100-year-old shipwreck you can walk up to at low tide.

Like something out of a pulp adventure, this abandoned plane wreck is slowly being retaken by the Caribbean jungle.