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

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

An original apothecary from 1792.

The 28-foot granite map plots the locations of 40 theaters in New York City.

A small Richmond island dotted with the remnants of hundreds of years of history.

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

A snapshot of the city's fascinating voodoo culture.

A park filled with vibrant mosaics created by more than 300 folk artists.

This shifting North Carolina sand dune is an odd little desert surrounded by oceanic forest life.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

The first memorial dedicated solely to the Black troops who fought for the Union.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

Perhaps the most scandalous statue of America's first president.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

After over 100 years out of service this landmark windmill once again turns as a symbol of Jerusalem's self-sufficiency.

This hobbit-y little hot spring may be the oldest spring used by humans in all of Iceland.

This stone complex marks the urban center of a lost civilization.

This elaborate towering structure was once famed for its revolutionary height.

At 207 feet, one of the world's longest continuous escalators.

After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

Packed with gear and memorabilia, this museum chronicles the history of skiing and how its rise shaped New England.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.