Take afternoon tea in a 17th-century almshouse.

A monument with a strange legend involving a horse's tongue.

This library dates back to the late 17th century and was one of the first public lending libraries in England.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

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

The ruins of a church destroyed by both the Great Fire of London and the Blitz, now turned into a peaceful garden.

Murals of the wild parties once held on the frozen River Thames.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

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

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

This hydraulic power system in London was, at one time, seen as a rival to electricity and the last of its kind to shut down.

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

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

London's amazing modernist public square that never was.

This quarter-mile tunnel under the Bluff in Pittsburgh bends at a 45-degree angle.

A piece of baseball history is preserved in a Pittsburgh parking lot.

An imposing pair of sphinxes stand guard outside this Egyptian Revival tomb.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

A museum wholly devoted to juvenescence.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A 19th century library favored by Edgar Allan Poe and H.P. Lovecraft, known by locals as "the Ath."

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.