This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

Ancient pueblos built into the base of a natural canyon wall.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

This historic national park is covered in the stunning ruins of red rock pueblos.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

See massive fossils that are over 200 million years old in northeastern Arizona.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Dramatic river bend surrounds a natural red-rocked pedestal.

The oldest original lighthouse in Alaska that was born out of a tragic shipwreck.

A whale of a public art display towers atop Juneau's cruise ship dock.

A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

A historic freight system that found the true gold rush is in tourism.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

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

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.