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

Ship-sized kinetic sculptural fantasy.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

London's amazing modernist public square that never was.

A naturally mummified 2,000-year-old man.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

The television series' iconic giant foot was borrowed from this classical painting.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

Giant, friendly pelicans in Central London, the most unlikely of places.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This bridge was constructed from the rubble of the infamous Bastille.

A surrealist timepiece by the artist of melting clocks.

The celebrated eyesore created by starry-eyed sweethearts.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

The mystic whose incorrupt corpse still attracts the faithful.

An alchemist's "magic door" stands in the middle of a Roman park.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

Breathtaking and huge 430 year old maps of Italy.