The only thing stranger than stumbling onto these philosophical musings is the story of the homesteader who created them.

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

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

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

A rare kind of blue bear can be found chiefly in the national park that shares their name.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

These ruins of a pre-Columbian cliff village are among the most beautiful and well preserved in New Mexico.

A 19th-century cabin built into a hollowed-out Sequoia tree.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

This expansive bridge in the Canadian wilderness was originally just built for friends.

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

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

A symbol of friendship between the mountainous regions of Switzerland and Bhutan.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

This terrifying glass bridge on the side of a mountain cracks as you step on it.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

This colorful overpass is one of Bhutan's longest suspension bridges.

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

This Nigerian nature reserve is home to the longest canopy walkway in Africa.