A lasting testament to the Klondike Gold Rush.

The building where Mary, Queen of Scots was said to have bathed in white wine.

A stone pillar marking the location of the westernmost battle of the American Civil War only honors one side of the conflict.

This site contains overlapping ancient graveyards that existed about 1,000 years apart.

Visitors to this public park will also find the ruins of an old western fort.

An important piece of history from mankind's journey to the moon sits in the lobby of a government science lab.

A replica of the flagpole that gave a frontier town its name.

Home to a full cast of the largest woolly mammoth ever recovered in North America. 

This tiny square mile of Canadian sand was once considered the world's smallest desert.

Witnessing the might of this dessert-colored desert waterfall is a rare, powerful treat.

This rustic cabin, outfitted with gun slits, was once home to John D. Tewksbury, patriarch of the bloodiest family feud in American history.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

A walk through the historic city center, under the streets of Seattle.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

When ecosystems collide in the arid Southwest.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.