Stretching across western Newfoundland lies an 1,100-mile expanse of the Appalachian Mountains, a picture-perfect corner of the Canadian wilderness: Gros Morne National Park. Embark on a sensory adventure through a land of glacier-carved fjords, cascading waterfalls, and soaring cliffs.

Stretching along 600 miles of Northern Chile's Pacific coast is the dryest non-polar region on Earth: the desolate Atacama Desert. From menacing volcanoes to wondrous natural geysers, experience one of South America's last great wild lands, one that few have ever laid eyes on.

Beneath the blazing Bolivian sun lies a land of extremes, ranging from desolate highland plateaus to dormant volcanic landscapes. But the true wonder of this astonishing land is Salar de Uyuni--an endless salt flat so blindingly white it can be seen from outer space.

The desert landscape of Utah is home to one of the world's most spectacular and unforgiving natural settings: Zion National Park. A 100,000-square-mile marvel of deep canyons, majestic arches, and towering sandstone walls, it's a land shaped by unimaginable geological forces over millions of years.

Journey to the outback of southern Utah and northern Arizona, where towering rock spires give way to sweeping canyons in one of the most majestic American landscapes. From Glen Canyon to the Paria Plateau, explore these natural wonders and the ancient geological secrets they hold.

Take in the Bahamas as you've never seen them before, from towering pine forests to dense coastal mangroves. The most daunting and unexpected attractions, however, are its flooded inland caves--geological wonders adorned with otherworldly stalactites that shimmer in the darkness.

Lake Superior is a rugged natural wonder and an ancient haven for remarkable geological and cultural history. Step into the picturesque settings of one of North America's most important natural regions and learn about the unique history of its indigenous people.

The visual magnificence of the Niagara Escarpment is only really matched by the richness of its First Nations lore, dotted with epic tales of heroic figures and mysterious spirit worlds. Immerse yourself in the dazzling geological attractions of this truly historical corner of North America.

Iceland is the world's largest volcanic island, a fact that's makes it a breathtaking, but deadly, geological marvel. Take a journey along a ridge that divides continents, follow endless fields of solidified lava, and witness the rare and striking spectacle of a volcano erupting under a glacier.

Mosses that tower 10 stories high and insects of horror-film proportions are part of the Bay of Fundy's peculiar ecosystem, which dates back hundreds of millions of years. With the highest tides on Earth, waves rip rocks off cliffs and reveal fossils that are vital to understanding the history of our planet.

The hostile waters surrounding Wales have caused hundreds of shipwrecks and sculpted the stunning scenery of its wild coastline. Take a serene tour of the world's longest continuous coastal footpath and explore its mysterious caves, cliffs full of fossils, and causeways that disappear.

Ireland is a land studded with majestic natural landmarks. Learn the history and myths behind the distinctive features of this rugged island, including the 700-foot-tall Cliffs of Moher, the 40,000 stone columns known as Giant's Causeway, and Slieve Gullion, a mountain that rose from molten rock.

The tectonic forces that bring life to Canada's rain-forest paradise, Vancouver Island, belie a dangerous feature: the inevitability of a megathrust earthquake that could trigger a 4,000-mile tsunami! The question scientists have yet to answer is when it will strike.

The Yucatan is a paradox: a rainforest where rainfall is rare, with no major rivers or streams. Instead, beneath the forest floor lies a mysterious ecosystem, an elaborate web of flooded caves known as 'cenotes'--Mayan for 'sacred wells'. More people have walked on the moon than have reached the end of these caverns, but their presence has fueled an astonishing diversity of life: from trees with hundred foot roots that still draw water, to a rich tapestry of exotic animals--like the howler monkeys whose cries fill the lush undergrowth.

The Sierra Gorda isn't one world, but a patchwork of distinct landscapes separated only by mountainous elevation. From mist-covered cloud forests on the east side to a rain-deprived desert on the west, the Sierra Gorda is comprised of towering cacti, a crystalline river inhabited by the unique axolotl, and a 1,400-foot monolith that stands as a tribute to the region's volcanic past. Higher up, tropical and alpine species of fauna and flora intermingle, creating the signature diversity unique to the "wild heart of central Mexico."

Perched between the Pacific Ocean and the Caribbean Sea lies Costa Rica: a tropical corridor brought to life by moisture-laden trade winds, raging rivers, and active volcanoes that simmer ominously. Together, they make up a fertile paradise of cloud forests that are home to green iguanas, sloths, and aptly named howler monkeys. The startling diversity extends to the surrounding coastal waters, where the mangrove forests provide an unlikely nursery to one of the ocean's most exotic predators: the hammerhead shark.