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Natural Wonders

Basin from above

Lincoln, New Hampshire

The Basin

Even Henry David Thoreau found this glacial pothole irresistible.

Looking up from the entrance to the Hidden Beach.

Islas Marietas, Mexico

Hidden Beach

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Santa Catalina, Colombia

The Volcan de Lodo El Totumo

The caldera of this mini-volcano has been turned into a naturally heated mud bath.

Walls of the gorge

Vilémovice, Czechia

Macocha Abyss

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

Aguinid Falls

Oslob, Philippines

Aguinid Falls

Calcium-rich water has turned the water and rocks of these Philippines falls slightly green.

Mount Sunday

Ashburton Lakes, New Zealand

Mount Sunday

Edoras, capital city of Rohan in Lord of the Rings, once sat atop this isolated New Zealand mountain.

From here it looks like a cave, but guess what? It's a bridge.

Tonto Natural Bridge

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Wolf Creek Trout Lily Preserve

Whigham, Georgia

Wolf Creek Trout Lily Preserve

This protected reserve is home to a rare and beautiful species of flower.

Ses Fonts Ufanes

Campanet, Spain

Ses Fonts Ufanes

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

Taza Province, Morocco

Friouato Caves

The true depths of these stunning Moroccan caves are unknown.

Earth Pyramids of Platten

Earth Pyramids of Platten

These delicate sand pyramids look like naturally occurring gothic spires.

McKenzie Bridge, Oregon

Proxy Falls

This frequently-photographed waterfall takes only a short hike to visit.

Mystic Hot Springs

Mystic Hot Springs

One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Red Tides Are The Auroras of the Sea

Eric Grundhauser January 27, 2016

Falmouth Springs

Falmouth, Florida

Falmouth Springs

The so-called "world's shortest river" is actually a window into a cave.

El Arco

Cabo San Lucas, Mexico

The Arch of Cabo San Lucas

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Williston, Florida

Devil’s Den

This underground oasis is one of North America’s most fascinating prehistoric places—and you can scuba dive in it.

Pähni Megaphones

Varstu Parish, Estonia

Pähni Megaphones

A trio of giant wooden megaphones turn up nature's volume in this Estonian forest.