A student driver's nightmare.

360° views of the city plus five floors of optical illusions and hands-on science.

A kaleidoscopic warehouse-maze of handmade neon signs.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The world's largest collection of witchcraft regalia.

This tangled English forest looks like something right out of a fairytale.

400-year-old garden, restored to beauty.

A medieval weapon rumored to have been used by the brilliant poet himself.

The mummified relic of St. Antoninus.

Art and armour fill every inch of this rich kid's Italian villa.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The oldest operating pharmacy in the world features 800-year-old recipes.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The middle finger of modernity.

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

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

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

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

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

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.