A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

An overlooked memorial honoring the local Washington residents who died in World War I.

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

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The controversial urban planner who designed Washington, D.C., was buried in Maryland, and can presently be found in Virginia.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

Long buried under the 20th-century landscape, this lift lock of the Alexandria Canal is the lone remnant of an ambitious early American transportation project.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

The narrowest house in America is seven feet of pure spite.

Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

A former major munitions plant that has been converted into a sprawling art space.

This rare triple-jurisdiction drawbridge passes through Virginia, Maryland, and Washington, D.C.

America's first federal monument.

In the middle of one of South America's most historic walled cities lies a bar with an enormous collection of Soviet memorabilia.

A cozy bookstore and coffee shop in the heart of Cartagena's Old City.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

Perched atop the highest hill in Cartagena, this 17th-century convent offers spectacular views of the city.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

This quirky piece of naval artillery has been deafening Canadians for over a century.

A pixel art killer whale is frozen mid-leap in this Vancouver square.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

Traditional 15th century Chinese garden in the middle of Vancouver.