At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The mark of the Devil's horns on a marble column in Milan.

The odd depiction of the Virgin Mary and baby Jesus is rooted in the Catholic Church's eradication of Catharism.

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

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

An enigmatic modern marker left next to a historic Roman site.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

100 year tradition of fist fights, marked by marble footsteps.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

Elevated freight railway turned wildly successful urban park.

The great polar explorer is remembered in this far northern town, where he embarked on his final expedition.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A massive underwater sinkhole made famous by Jacques Cousteau.

The celebrated eyesore created by starry-eyed sweethearts.

A bit of retro transportation flair preserved in the world's largest department store.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A reminder to choose water over wine since 1888.

The former sign of this immortal music venue is just that--undying.

A community of artists and entrepreneurs seeks a simpler life on London's waterways.