The vast, legendary catacombs hold secrets much stranger than stacked bones.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

The largest and most famous wax anatomical collection anywhere in the world.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The real-life site of Ichabod Crane's infamous gourd attack.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

The attic of a four-century-old canal house hides a clandestine church.

A beautifully eclectic mix of architectural styles.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

A curious collection dedicated to human and animal anatomy and pathology.

Cat art as far as the eye can see.

Museum preserving torture methods from the past.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

One of only two commuter aerial tramways in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.