The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Check out a shovel along with your Shakespeare.

A small obelisk marks the spot where Captain Sam Greele was killed by a falling tree.

A historic home with ties to the abolition and suffrage movements.

St. Augustine's record-setting narrow street was designed to protect against pirates.

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

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

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

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The remains of Martha, the last known passenger pigeon, serve as a tool to educate about conservation.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A building so large that it has its own weather.

One car at a time please.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

One of the largest Native American shell middens stands 30 feet tall.

"We Seceded Where Others Failed."

The third tallest lighthouse in America once guided author Stephen Crane to safety.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

A monument celebrating the idea of reaching inaccessible places.

An 18th-century Spanish watchtower made entirely of seashell and concrete.