Nature: Environment Stories

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Wilderness Wonders: Biggest Cave

The Sarawak Chamber at Gunung Mulu National Park in Malaysia has over 186 miles of caves.

Bioluminescent Organisms: 3 Living Lights

According to folklore, the soft light emitted by bioluminescent organisms is magical. In reality, the eerie glow results from a chemical reaction–but it still looks enchanting on a moonless or cloudy night. Here's where to glimpse these living light bulbs.

Wilderness Wonders: Largest Crater

Zebras, wildebeest and rhinos all call this Tanzanian volcanic caldera just another place to eat.

Wilderness Wonders: Highest Biodiversity

From jaguars to river dolphins, Amazonian animals are diverse.

Wilderness Wonders: Highest Peak

There is a reason the native's call it Sagarmatha, meaning "head of the sky."

Mount Rainier: Thunder on the Mountain

Two years after hurricane-force winds and rain ravaged hundreds of miles of trail in Mt. Rainier National Park, the true damage is finally becoming clear. And what it's telling scientists is alarming: Bigger, more frequent–and more destructive–storms may be coming.

Phenomenon: Glacial Relics

The Ice Age left its mark from Acadia to Yosemite. Here's scenic evidence.

Wilderness Wonders: Driest Desert

If your going to Chile's Atacama Desert, don't forget the sunscreen.

Wilderness Wonders: Tallest Waterfall

Think the Empire State Building is tall? Try this waterfall on for size.

Wind Power: Turbulence Ahead

Wind power offers clean energy–but how much will hikers compromise to get it?

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