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

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

America's oldest drive-in movie theater has been in continuous operation since 1934.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

If you don't look closely, you might mistake this sculpture for just another passenger waiting at the airport.

This museum preserves the heyday of Puerto Rican coffee.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

A park where people have been going to feed friendly pigeons since the 18th century

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The bat-covered home of one of the world's most popular brands of rum is located on a tropical Art Deco campus.

These red and black houses were awarded to the firefighters who saved their city from an enormous blaze.

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.