The sign at the garden gate reads: "These Plants Can Kill."

A crumbling hospital from the 1850s on Roosevelt Island.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

One of the oldest living oak trees in the Southeast.

This 19th-century former train station’s unusual roof shape earned it a rather witchy name.

Outside Hope College in Holland, Michigan, a marker honors a University without people from the fictional Kcymaerxthaereal times.

In Grand Rapids, Michigan, a marker honors the creation story of a proud fictional culture.

A lavender labyrinth so large it’s visible on Google Earth.

This lovely public park has an intriguing past and unique wooden bridges made of concrete.

One man’s vision of living among dinosaurs credits Jesus Christ as the engine of biological evolution.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

Ancient petroglyphs discovered only after a massive fire swept across Michigan in the 1880s.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A strange and haunting monument of unknown origin in the historic Graceland Cemetery.

Home to a protest movement, a bombing, and a dramatic change in labor history.

A bizarre form of natural mummification was discovered in the church of this Frisian village.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

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

This sublime architectural marvel is a rare example of an expressionist church.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

A natural wonder in south Denmark.