The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The Egyptian-inspired last resting place of Lord Kilmorey.

Eclectic final resting place of the controversial explorer.

A historic arboretum and non-conformist, non-denominational park cemetery.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

One of the world's oldest fossil exhibits is on display in a beautiful antique "naturalienkabinett."

The site of London’s first coffee house has been serving refreshments of one kind or another for 360 years.

Rebuilt remains of a temple to Roman god Mithras.

The biologist's fossilized headstone was meant to reflect his love of nature. Its, ahem, unusual shape is probably just a coincidence.

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

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

Hidden in the courtyard of the Victoria and Albert Museum is a little-known tribute to two celebrity pooches.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

These ornate arches show how the course of the River Thames has changed.

Pop culture has helped to keep this iconic British building from being destroyed.

A living memorial to the trees London lost during the Great Storm of 1987.

Buried for centuries, this hidden cellar is all that remains of London's medieval Whitefriars Monastery.

A mysterious carving from 17th-century London seemingly depicts a young boy sitting on a bread basket.

A traditional American farmhouse plopped in the middle of a Piccadilly courtyard.

London's marvelous wildfowl reserve along the Thames.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.