This Stone Age solar temple aligns with the sun on each equinox and solstice.

The hidden lair of an alchemist rediscovered in a 2002 flood.

A Jenga-style cylindrical tower of books that appears to go on forever.

A church of bones, decorated with 40,000 human skeletons.

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

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

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

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

Numerous stone coffins from different centuries, lined up in a sixth century basilica.

A gorgeous medieval library where the books are kept in chains.

The collar worn by a fourth-century saint resides in this church, and is still used for blessings to this day.

Where members of the Crossbow Corps of San Marino demonstrate their skills.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

The San Marino-Rimini railroad was short-lived but this tunnel once provided shelter for hundreds of refugees during World War II.

One Italian taxi driver covered his entire house in small seashells creating a weird bit of architecture that is preserved to this day.

Famous landmarks and structures from across Italy fill this miniature park.

The only Shinto shrine in Europe that has been officially sanctioned by Japan.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

A map of Italy made entirely of trees.

The giant skeleton sculpture is surprisingly well-traveled.

A 16th-century horror show built in a lovely Italian garden.

Water and windows define this defensive Italian well.

Romans built the world's tallest artificial waterfall in 271 BC.