Architectural monsters are devouring this palace's every door and window.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A secluded oasis of contemporary art and natural beauty.

Sip cherry liqueur at a bar dating back to 1840.

Eat the ultimate iteration of Portugal's most beloved pastry.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

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

This curious, round temple is the oldest still-standing marble building in Rome.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This ancient market is often referred to as the oldest shopping mall in the world.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

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

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

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

Ancient ruins hidden underneath a modern luxury hotel.

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

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

A tiny chapel and burial site lurk underground in Jajce.

An old spa town in the mountains of Romania where, according to legend, the great hero Hercules once bathed.