Places hardwire75 Wants to Go

These "anatomical machines" are only one of the many strange items in this Italian crypt.

This monumental fountain has moved around the city multiple times.

The relics of dozens of martyrs are stored in a single chapel.

An eerie, little-known Neapolitan museum filled with preserved human remains.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Virgil's many-mouthed gateway to the underworld.

The underground sanctuary of a mysterious ancient Roman religious cult contains an exquisite traditional fresco.

This medieval Italian town is a sheer (and beautiful) cliffside defense.

Unscathed for almost 2,000 years, the best preserved Roman triumphal arch is in a small southern Italian city.

A mountain cave is the site of archaeological findings and Paleolithic rock art.

This crystal clear water basin feeds the Lao river and powers a hydroelectric power plant.

A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

Skulls and skeletons are omnipresent in this church dedicated to souls trapped in purgatory.

This ossuary is more than five centuries old and is heralded as one of the finest in Switzerland.

For centuries no one knew there were hundreds of bones and precious artwork hidden beneath this Swiss church.

Every year, a sparkling cave is sculpted in the icy heart of a glacier.

An icy lake tucked among jaw-dropping alpine panoramas.

Swiss vineyards in a UNESCO heritage site.

Artworks by loners, prisoners and the criminally insane.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

An opulent monument built for a duke who donated his entire fortune to the city of Geneva.

Series of underground houses inhabited continuously for centuries.

This fascinating abbey is considered the oldest monastery in the region.