One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

The spot where three Protestant clergymen were burned at the stake during the reign of "Bloody Mary."

One of Europe's oldest libraries.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

This charming English house was once the home of England's most famous poet.

Hollywood's oldest hotel is the site of the first Academy Awards, the birthplace of Marilyn Monroe's career, and the home of Montgomery Clift's ghost.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

A unique tribute to the millions of animals who served and died for the British military.

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.

An eccentric 18th century naval officer built a ship's quarterdeck on his roof, the inspiration for Mary Poppins's "Admiral Boom."

A quiet memorial to those who died saving others in the heart of the City of London.

This one has sailed five times as far as Sir Francis Drake's famous ship.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

This luxury shopping lane has been protected by its own tiny police force for over a century.

Explore nearly 400 years of English middle-class home life.

Two plaques commemorate the site of Shakespeare's first theatre.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.

This hidden green space is the city's second largest conservatory.

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