This artist's home turned gallery/museum preserves the creator's love of "Eastern" influences.

The television series' iconic giant foot was borrowed from this classical painting.

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.

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

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

The heads of two giant mythological water horses honor Scotland's horselord past.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

The last bastion of Roman presence north of the Alps looms over a German town.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

This stunning concert hall has become a symbol of Iceland's national recovery.

Overlooking a Scottish loch, this beautifully crumbling castle once inspired a poem by William Wordsworth.

Monasteries on rock pillars, once accessible only by frayed ropes.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A hugely vast Irish landscape of barren rock that stretches for miles.

This ancient Irish tower could easily have stood in for Rapunzel's prison.

This single room has survived the centuries with almost no deterioration.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

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

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.