The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

Upside-down trees serve as natural flower pots in this hanging garden of Alaska.

The ghostly remains of what was once the world's richest copper mine.

The king of U.S. high points towers over every other peak on the continent.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The ruins of a town wiped out by the second-largest earthquake in recorded history.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

Colorful boxes placed over the dead are left to rot and crumble.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

Clean, cold drinking water flows from a nondescript pipe in a roadside rock face.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

Considered by many to be one of the most dangerous highways in Alaska.