A tree bears footwear on the loneliest road in America.

The smallest country in the world.

A picture-perfect town, perfect for blowing up.

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

Towering basalt columns, a creation of fire and ice.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

The rocks in this arid basin leave trails of movement behind them.

One of the most unusual geological features, recognizable from a dozen hit movies.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

Home to some of the oldest hominid fossils ever found.

70,000 empty bottles of Coke comprise an ad seen only from the air.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

An unrealized dream to wirelessly electrify the entire Earth.

A free library to stumble across, one of many placed worldwide if you know where to look.

An artsy hidden staircase leads to breathtaking views of San Francisco.

Michael Heizer's masterwork in the Nevada Basin.

This attraction was abandoned after the Chernobyl disaster.

A starship has landed in Texas, a welcome break for weary travelers from a drab stretch of I-35.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

Tour the original street level of Port Angeles, buried underground in 1914.

Underneath a chalk hill in France lies what Hitler hoped would be the underground launching base for a devastating new weapon.

Craft liquors concocted in an old Seattle warehouse.

A tree full of wishes and footwear.