The astonishing collection of an infamous criminologist.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

Macabre museum devoted to historical Viennese murders.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

This former insane asylum now holds a pathological anatomy museum.

The solemn exterior conceals an opulent interior of this 17th century church.

An exquisite Baroque church in Vienna's old town.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The final resting place for the remains of 143 Habsburg royalty.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

One of the best collections of wax anatomical models in the world.

It holds a fabulously designed tribute to astronomer Edmond Halley.

At almost 1,000 years old, this is the oldest known door in all of Britain.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.