This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

The secret medieval communication system will whisk your words above the noise of the crowd.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

Two stone columns flank the grand Venice square, but there were supposed to be three.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

Abstract monuments express sorrow and resilience at the site of a horrific massacre in Nazi-occupied Serbia.

A tribute to an iconic act of defiance from the Croatian War of Independence involving a small car.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

An abandoned monument remembering the "Pančevo Holocaust" now stands as a shadow of its former self.

The medieval home is still engraved with the symbol of the profession, an eye flanked by two axes.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Legions of Roman soldiers bathed in this ancient spa complex under a Budapest transit station.

Abandoned Roman Catholic chapel abused by Satanists before being restored.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

A tribute to a man who defied the Nazis until his last breath.

A tribute to a Ukrainian heroine who went undercover and killed several Nazi operatives.

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

These lesser-known Maltese catacombs date back over 1,700 years.

This unique building in the main square stands out among the city's typically Baroque architecture.

A modern, secular take on a traditional Virgin Mary motif.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.