Scattered throughout London are ancient remnants of the city's former bounding wall.

A hidden plaque is the only reminder of the lost palace where two storied English kings were born.

This pedestrian walkway cuts through a cemetery and over several burial vaults.

Recently restored menagerie of Victorian-era beasts.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

A perfectly running 230-year-old silver automaton and music box.

These Victorian era devil sculptures were designed to spite a local vicar.

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

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

Seat of the Duke and Duchess of Devonshire for centuries.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

This antique prison is a tourist attraction with a sordid past.

Home to the most complete dodo remains known - one head, and one foot.

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

These docile dragons are ideal inhabitants for the conservatory greenhouses.

This ancient oak plays host to carvings of magical elves, gnomes, witches, and other creatures prominent in local folklore.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.