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

An architectural oddity hides in plain sight on this iconic London bridge.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

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

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A memorial for public executions that dates back to the 14th century.

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

Centuries-old hoofprints and wagon tracks reveal themselves after a good winter storm.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

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

America's oldest archaeological site or a muddled case of wishful thinking.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

The world's largest piece of copyrighted artwork.

The homestead of American patriot John Adams.

Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

The quiet canyon has a tumultuous history involving a doomsday cult.

The oldest surviving wood-frame building in North America is still in the family.

A bright California graveyard with a decidedly dark side.

Yo, Adrian!

The world’s first penitentiary, meant to be humane, drove men insane.