This Brazilian town built by Freemasons is full of colonial Masonic architecture and symbolic imagery.

This stone monument marks the beginning of Portugal's presence in Brazil.

A bright little alley in La Boca is a part of tango history.

An interactive exhibition space dedicated to the kinetic sculptures of Swiss artist Jean Tinguely.

This artistic fountain display pays homage to this area's theatrical history.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

A fairy tale castle in modern Rome.

A huge enchanting public park just outside the ancient walls of Rome.

The yawning maw of this pagan visage is said to bite off the hands of liars.

This is the oldest Roman-made bridge in the city still existing in its original state.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

This one has sailed five times as far as Sir Francis Drake's famous ship.

An incarceration museum on the spot of possibly the oldest prison in England.

Murals of the wild parties once held on the frozen River Thames.

This South London cemetery holds the remains of more than 15,000 people.

The London statue that imitates passersby.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

The narrowest street in Paris.