This lavish 20th-century casino adorns labels for San Pellegrino water.

The haunting remains of a World War I fort perched atop a mountain.

Exchange a book at the entrance of this medieval Lovere alley.

Liechtenstein's royal family calls this medieval alpine castle home.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

One of Ayutthaya’s most iconic locations is a mysterious, hauntingly surreal miracle.

Angels and demons watch over newspapers in this deconsecrated church.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

An ancient cemetery hides behind a line of disparate chapels.

Beautifully decorated tarot cards from the Middle Ages.

The bones of some 7,000 soldiers killed in the historic Battle of Solferino are stored here.

A small villa said to have inspired the design of the court jester at the heart of Giuseppe Verdi's 1851 opera.

The seat of the Mantua bishop holds many secrets within its walls.

A medieval tower with a suspended iron cage used as an open-air jail for criminals who were exposed as a warning.

A room filled with frescos that make it seem like the walls are crumbling down while giants die in despair.

An architectural oddity where the triglyphs of the courtyard of walls create an optical illusion.

An abandoned pasta factory in the centre of Bucharest, once home to Bulgarian revolutionaries and a hub of crime.

Musings of an artist carved into a rural stonewall.

A little-known, yet charming glacial lagoon.

This abandoned IDGZ station was one of 49 troposcatter stations in the NATO ACE High network.

A neglected spomenik overlooking the beautiful Kopaonik Mountains.

The walls of this tiny Italian church are entirely covered with frescoes.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

Memorial to the victims of the Holocaust in Serbia.