The only National Monument ever to go missing for nearly 50 years then resurface in a dump.

This lovely pocket park is one of the most under appreciated in D.C.

The oldest continuously operating fish market in the United States.

Believe it or not, the now-ubiquitous California avocado originated in Guatemala.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

Guatemalan womanizer, venerated during Holy Week.

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

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

Four-story concrete hotel never opened to customers.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

Walk in the footsteps of the gods and straddle two tectonic plates.

An abandoned dollhouse factory.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

For thousands of years, Native American hunters drove buffalo straight off this cliff in Montana's Yellowstone Country.

Part of a WWII submarine is lurking outside the Washington Navy Yard parking lot.

A historic neighborhood church is reborn as a psychedelic arts collective.

A super-sized promotional trick that is now a D.C. landmark.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

New York City's smallest piece of private property.

World's first "penitentiary," meant to be humane, drove men insane.