Northern Ireland's Brobdingnagian stepping stones.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A charmingly eccentric magma chaser presents his complete history of the island's eruptions since 1947, in cinematic form, just for you.

Medicinal spa created with the discharge from a geothermal energy plant.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Three columns of volcanic rock shoot out of the ocean.

Twisted girders are all that remain of an Icelandic bridge that was wiped out by a combination of volcanic heat and glacial floods.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

This rocky spread has been squeezed up directly from the bowels of the earth.

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

Home to items never before seen by the public.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

When ecosystems collide in the arid Southwest.

A bygone village occupation lives on via this quaint public chalkboard.

A very big rock just plopped down in the New England woods.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

Even Henry David Thoreau found this glacial pothole irresistible.

Friction between grains of sand cause a curious "singing" sound.