The largest greenhouse in the world is home to over one million types of plants.

Ghosts of France's colonial past.

Bug-devouring flora are the stars of a special wing of the glass conservatory.

A vast array of tropical plants collected by a vacationing couple.

Chewing gum tycoon's memorial lies perched over wife's botanical gardens on Santa Catalina Island.

The largest collection of medicinal plants in Australia is also home to a witch who will show you how to use them.

Arcadia is home to a haven for nature geeks and 80s TV lovers alike.

Ruins of a 10th century church tucked away deep in a botanical garden.

A magnificent Victorian garden that brings the charm and style of old-time aristocracy to the 21st century public.

Olfactory delights in San Francisco's Botanical Gardens.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

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

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

A suspended garden, now gone, once hung in the middle of this abandoned church.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

A toxic ghost town sitting atop a massive coal fire.

A curious friendship between two inanimate ladies.

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

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A rare view of a preserved Victorian science museum.

Century-old shop, specializing in Occult products.

World's first "penitentiary," meant to be humane, drove men insane.

The remains of a hospital ravaged by fire, once a progressive place of innovations for disabled children.