This mysterious structure by the Washington Monument is a flood barrier designed to protect the White House against rising waters.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The first museum in the world devoted to sexual gadgetry.

This road winds through the steep coastal cliffside offering spectacular views for those who brave the drive.

The maze-like transportation hub contains abandoned areas, derelict stores, and a resident bat colony.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

The home of the Dead Sea Scrolls is an abstract modernist dream.

The bluer than blue waters in these natural Israeli caves are reached via the world's steepest cable car.

It's just another skyscraper, but it's shaped like '90s cell phone.

This sculpture meant to honor the bravery of the Indigenous Mapuche people of Chile proved controversial.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

The longest continuous underwater road in North America was built at the insistence of Franklin Roosevelt.

The blinking light atop the iconic landmark has been sending secret messages for decades.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

A visionary, futuristic sculpture in Los Angeles that never met its extraterrestrial potential.

World's largest collection of serial killer artwork and other macabre exhibits.

This stately clubhouse has showcased German-American culture for over a century.

The rustic think-space of famed naturalist John Burroughs stands exactly as he left it.

"A hideous albatross in the Hudson River Valley."