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

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Protecting the dead from opportunistic body snatchers.

A book bound in the skin of an infamous criminal, along with countless other specimens.

These tiny effigies are believed to represent victims of Edinburgh’s notorious Anatomy Murders.

A 18th century graveyard and its astonishing cortege of macabre iconography.

This early version of the guillotine was used to execute the man responsible for its construction.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

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

This South London cemetery holds the remains of more than 15,000 people.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

France's most famous cemetery, with some of its most curious tombs.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Ancient burial grounds of the wealthy.

Sweden's "good old days" painstakingly re-created in a model village.

It houses the remains of a 17th-century version of the Titanic.

The only castle in North America to ever house European sovereigns.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

The anatomical-pathological collection of a man who changed surgery.

One could not be blamed for literally walking all over this supposed landmark.