Maine’s only official memorial to the Underground Railroad.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

A wall of chewing gum moonlights as collective art.

A walk through the historic city center, under the streets of Seattle.

A giant Troll lurks under one of Seattle's oldest bridges.

A hugely vast Irish landscape of barren rock that stretches for miles.

This single room has survived the centuries with almost no deterioration.

The ancient tomb acts as a calendar that keeps perfect time.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

In Egypt's expanding metro area, many of the neighbors are dead.

An endless sea of white conical domes.

Ozymandias’ time-keeping temple.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Rebuilt remains of a temple to Roman god Mithras.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Plaque remembering the 18th century forced relocation of Acadians.

A century after his death, this covered bridge still calls to mind the plein air painter who loved it.

A tribute to Ponce de Leon's supposed quest for eternal youth.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The museum chronicling a treasure hunter's dream, fulfilled.

"We Seceded Where Others Failed."