More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

This kitschy tavern is also home to rare early editions of "Treasure Island."

"X" marks the spot of an echo chamber in the middle of a plaza.

A 19th-century cemetery device to ensure that the prematurely buried would be "saved by the bell."

Over a dozen Native American earth mounds dating back over 2,000 years dot this Tennessee archaeological park.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

This unassuming passageway played a key role in one of the most important events in U.S. history.

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

In the depths of the Everglades, one man has dedicated his life to studying the elusive Skunk Ape.

The largest retailer of seashells in the world.

Former utopian colony based on the belief that the universe exists in a hollow sphere.

One-time winter retreats of prolific inventor Thomas Edison and his friend Henry Ford.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

This spooky statue sits outside a famous Prague theater.

Walk through Czech history in Prague's largest graveyard.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Two stunning 17th-century libraries and a cabinet of curiosities.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

A Jenga-style cylindrical tower of books that appears to go on forever.

This doorless 20th-century elevator doesn't stop or slow down.