Research missiles and rainbow auroras at the world's largest land-based rocket range.

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

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

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

A trading post in the North Pole where children send letters.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

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.

This whimsical stacked cabin looks like something out of a children's book.

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.