This Pennsylvania structure, the oldest building in Gettysburg, was once a stop on the Underground Railroad.

Home of the only civilian casualty at the Battle of Gettysburg.

A museum dedicated to the history of electric interurban transit near the home of the first electric trolley system in the United States.

The train collection of an eccentric New England seafood mogul is now a National Historical Site.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

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

Victorian-era Londoners really wanted to believe this 17th-century cistern was actually an ancient artifact.

This Underground station has been a popular filming location for decades, even before it closed.

The (fictional) address of Sweeney Todd's bloody barbershop.

London’s first road overpass is so old that it was originally built for horse-drawn carriages.

Soon after its unveiling, this giant inverted globe sparked controversy and was vandalized.

The bones of two medieval royal lions were discovered at the historic fortress.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

The bronze uniforms commemorate the vital role of women during World War II.

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

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

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

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

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

A cluttered and astounding collection of antiquities and curiosities.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.