Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

The behemoth beasts engaged in an epic battle is the second-tallest statue in the contiguous United States.

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

This tall Massachusetts folly got its name thanks to all of the purple prose its vistas inspired.

Over fifty whirling pools left by the glacial age.

Jimi Hendrix's legendary recording studio in Greenwich Village.

Creating this diorama spurred naturalist Carl Akeley to begin advocating to protect the apes.

One of the most dazzling dioramas at the American Museum of Natural History is also one of the oldest.

Once a flowing stream and where the USS Monitor, the world's first ironclad, was built and launched.

The rare American Civil War-era weapon was never fired in anger.

The one-time office of the architectural firm that ushered in the Gilded Age is now a Club Monaco.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

The gilded vestiges of a sterling department store can still be found in a Brooklyn shopping center.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This neighborhood grocery houses a treasure trove of Eastern European delights.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.