A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

A haunting painting meant to capture the calamity of World War I.

This macabre painting of a Shakespearean scene looks like something out of a nightmare.

This mysterious and unique painting is filled with symbolism.

This haunting sculpture was created as a statement on the mechanized warfare of the First World War.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The bridge is a secret gallery of discarded gum that has been transformed into miniature masterpieces.

This enigmatic Iberian sculpture of uncertain origin may have once guarded a burial site.

Ship-sized kinetic sculptural fantasy.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A museum showcasing the work of a self-taught painter and sculptor spanning four decades of output in seclusion.

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

This grandiose staircase was part of the revival of a medieval Spanish architectural style combining Christian and Islamic influences.

This charming, medieval walled village is Spain's first "book town."

The oldest functioning mailbox in Spain was installed in 1793.

This "grandfather" eucalyptus is one of the tallest trees in Europe.

Natural stone arches form a walkable "cathedral" at low tide, then disappear entirely when the water returns.

A replica of the Roman emperor in glorious full color.

Europe's largest collection of matchbox designs is a fascinating exploration of the cultural history of the world.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.