An exhibit of endangered species confiscated from smugglers and passengers.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This green and white building is shaped like a massive Rubik's Cube.

The oldest operating picture gardens in the world.

Home to the last shore-based whaling station in Australia.

A sculpture serving as an homage to Pope John Paul II.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

Go inside to really appreciate this 500-year-old technological masterpiece.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.