This once-palatial plantation may have been the site where a draft of the Declaration of Independence was written.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

The highest point in Florida is still the lowest high point in the country.

These aggressively sustainable art homes look like something out of 1970's science fiction.

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

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

The resting place of a Civil War celebrity's amputated limb.

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 grand marble structure next to the White House is Andrew Carnegie's temple to Pan-American diplomacy.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A one-of-a-kind sundial at the Very Large Array honors a radio astronomy pioneer, incorporating the original piers from his breakthrough radio telescope.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Labor provided by Great Depression-era programs restored these 25,000 acres in Tennessee.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

In Tucson a giant metal snake helps pedestrians cross a busy highway.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Settled by the Church of Jesus Christ of Latter-day Saints in 1859, this abandoned frontier town has appeared in several films.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.