Catacombs turned marketplace.

This 13th century Gothic brick castle is the largest in the world by surface area.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

This bell stars in a tragic love tale and is said to make wishes come true.

Legend says this is actually a heartbroken prince waiting for his true love's kiss.

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

This Communist-era residential block is one of the longest residential building in Europe.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

These morbid carvings remind churchgoers of the inevitability of death.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

Black cat statues guard this temple-like Egyptian revival factory.

A famous burial ground with a history both grim and literary.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

This historic building displays the remains of a victim of the devastating 14th-century plague.

It's a mystery why these remains were found with no traces of their bodies in sight.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

A monument to the thrice mayor of London who according to lore made his fortune by selling his rat-chasing cat.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

Dictionary Johnson’s favorite feline.