Four-story concrete hotel never opened to customers.

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

An abandoned aircraft sits submerged in a lake in the Alaska wilderness.

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

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

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

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

One woman's dream became a train hotel in her backyard.

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

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