A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Small ship votives hang from the vaulted ceiling of this port-side church with a Latin inscription on the wall.

This haunting stone chasm is a hotbed of mossy rock and English legend.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

A grand imperial capital left to fall into magnificent ruin.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

A geological oddity topped with a 2,000-year-old pagan temple.

Monastery complex at the location where bodies of the executed Romanov royal family were discovered.

Rock-hewn monastery complex with hundreds of cave structures tucked away into the mountainside.

Small church on top of a huge rock column.

Stalin's march toward a more modern USSR flooded a monastery, leaving a unique and extravagant nautical marker, "The Flooded Belfry."

Monastery, army base, and infamous Soviet Gulag in the far Russian north.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

This 1000 year old relic-filled cave monastery and UNESCO World Heritage Site also hosts an amazing micro-miniature museum.

340-foot statue built to honour the Heroes of the Soviet Union.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

No one knows who built this strange cave of worship or exactly why.

Monasteries on rock pillars, once accessible only by frayed ropes.

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.