The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

This airport currywurst stand is made out of retro airplane parts.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

The naturally mummified body of a peasant girl saint.

Of the many Jesuit missions in South America, this complex is one of the best preserved.

The fighters and conspirators that won independence for Paraguay held secret meetings at this historic house.

These spectacular ruins were built by Spanish padres in the 17th century.

The only substantial part of Nazi Germany's formidable defensive line through Northern Italy that survives today, largely intact.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

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

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A stunning bridge that appears as if it's lunging to the shore, and has a legend of a devilish architect.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

The origins of a large, medieval castle are shrouded in mystery, but now it's a delightful garden.

The oldest church in Mantua was buried for centuries under the facades of other structures.

A modest museum in the final home of Italian poet and father of modern Italian, Francesco Petrarca.