An unusual number plate signifies the building's saucy past.

The Cimetière des Chiens et Autres Animaux Domestiques is one of the oldest pet cemeteries in the world.

A Gothic cathedral created from volcanic rocks.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

An icy lake tucked among jaw-dropping alpine panoramas.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

France's national museum of scientific and industrial instruments.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Abandoned railway line circling the city of Paris.

A grotto replicating one of the world's most famed Marian apparitions sits across the ocean from the original.

Collect holy water from a Bronx grotto.

The oldest continually used church in Minneapolis also sells great meat pies.

Beneath the city of Lourdes, France is a massive, concrete church.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

The medieval center of the Islamic world was also once the seat of Saladin's sultanate.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

This unassuming tree stump reportedly traces its roots to the famous pharaoh queen's reign.

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

One of the most well-preserved temples of ancient Egypt.

Ozymandias’ time-keeping temple.