Play heads or tails with thousands of different coins.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A Mars simulation in the southern Utah desert.

A small flooded ghost town with a few scattered structures remaining.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

Mystery surrounds a famous marshal of Napoleon's army.

Civil War soldiers, captains of industry, and paupers all interred on historic grounds.