Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The mystic whose incorrupt corpse still attracts the faithful.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

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

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

A Nesting Doll of Churches.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

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

An alchemist's “magic door” stands in the middle of a Roman park.

Rome’s legendary peephole vista is also a former Crusader stronghold.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

One of the largest squares in Europe contains an entire artificial island.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

The most impressive of Basel's three remaining city gates.

The immortal Hollywood star rests in peace in an unassuming Swiss village cemetery.

Legend says if you stick your thumb in the hole and it gets wet, your wish will be granted.

A rooftop restaurant hides in plain sight atop Vienna's Palace of Justice.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Go surfing on this urban wave, "hacked" by local surfers.