1. Iceland: Land of Fire

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.

2. Iceland: Land of Ice

3. High Tide at the Bay of Fundy

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.

4. Journey to Wales

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.

5. Ireland: Clash of the Coasts

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.

6. The Canadian Rainforest

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.