These crumbling towers are some of the last remnants of a centuries-old Vietnamese culture.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

This nugget of paradise earned its name for obvious reasons.

The Dead Sea Scrolls were discovered in the ruins of this ancient monastic community.

A tall karst islet popularized by 007.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

At nearly 1,000 feet long, this astonishing glass suspension bridge is one of the longest in the world.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

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.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

Walk 2,300 feet above the ground on the "Troll's Tongue."

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

It is said a heartbroken man visited the gap every day to stare blankly out at the sea.

Submerged lava formations create incredible waterworks.

Watch the newest land on the planet form before your eyes.

Rusty red sands line the shores of this Canadian Province.

A massive underwater sinkhole made famous by Jacques Cousteau.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The largest open-pit gold mine in Canada.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

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

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

Turnip-shaped island just off the Michigan shore in Lake Huron.

This park contains one of the largest concentrations of cedar glades, a unique and rare ecosystem.