Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

The house that birthed The Old Man and The Sea is now a museum devoted to the old man who wrote it.

A Cuban artist reclaimed his impoverished neighborhood as a dreamy folk art kingdom.

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

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

A black and white solution to the Bolivian city's traffic problems.

Scary metal statues adorn some of the signature buildings of Burlington, VT.

This 38-drawer structure claims the superlative title, but it isn't the world's only giant filing cabinet.

The "Seinfeld" diner.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The unbelievably opulent home built for an infamous newspaperman.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

This cavern was used as a hidden hospital and safe house during the Vietnam War.

Little Red Lighthouse under the George Washington Bridge.

Mysterious 500-year-old tapestries depict a unicorn hunt.

Visit the monolithic tomb of America's most famous general.

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

An ancient tunnel in Jerusalem built to redirect water in the event of a siege is one of history’s great architectural innovations.

New York's oldest and possibly grandest keeper of books.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

The origins of midtown Manhattan's anachronistic wooden farmhouse remain a mystery.