The mystic whose incorrupt corpse still attracts the faithful.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

Plaques on its facade commemorate the Tiber's most destructive deluges.

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

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A massive marble foot is tucked away in a small alley near the Pantheon.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This rare effigy of the author spent years lost in storage.

Ninety years of Sydney buses under one roof.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

A museum dedicated to one of Paris’s most famous residents, tucked into a corner of one of the city’s most famous squares.

This Parisian fountain is a little bit fantasy and a little bit nightclub.

A lone cannonball remains lodged in the walls of the Hotel de Sens as a sober reminder of a revolution.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

An unusual number plate signifies the building's saucy past.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

This 18th-century sundial was designed to calculate the date of Easter each year.

The history of radiation is on safe display at the foot of a radiation science laboratory.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.