Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

An abandoned facility that has become a place of ritualistic satanic worship, or so rumor has it.

A lush green oasis in the middle of Chicago.

A rare view of a preserved Victorian science museum.

The rocks in this arid basin leave trails of movement behind them.

Where manatees are the snowbird vacationers in these balmy Florida springs.

A museum befitting the city responsible for supplying the majority of the world's LSD.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

Franciscan monks created a facsimile of the Holy Land for North Americans who couldn’t afford the trip overseas.

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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

Rainbow-hued local gem in Venice.

This South London cemetery holds the remains of more than 15,000 people.

A beautiful geyser under environmental threat.

A prohibition-style speakeasy takes up residence in the last Victorian residence in Hollywood.

A hands-on traveling collection of the innovative devices of yesteryear.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.

Its buzzing collection honors vibrator history.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.

Started as a kitchen garden, now the second largest botanical garden in the world.

This abandoned amusement park was built on a site with a dark history.