Its dark depths conceal millions of rare, delicate crystal formations.

The park preserves a single, rare species of carnivorous plant that spells doom for unsuspecting insects.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

Rare and wonderfully wormy cadaver art captured in brass for centuries.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

A Roman spa buried deep beneath the City of London.

This overlooked street light once served as a KGB dead letter box.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

This hidden green space is the city's second largest conservatory.

This landmark church concealed a crypt packed with bones that was discovered thanks to the London Blitz.

Dictionary Johnson’s favorite feline.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Secret Manor, a house full of legends, the least of which is the haunting of long-deceased ladies of pleasure.

Over 300 taxidermied animals in a Californian restaurant make for a taxidermist's dream and an animal lover's nightmare.

Nursery with extensive collection of flesh-eating plants operated by the author of "The Savage Garden."

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

Sunset-colored dunes of volcanic ash make taking a poor photo impossible.

Dig for your own trilobites in this goldmine of invertebrates.

A psychedelic labyrinth on the San Francisco bay.

Mine your own precious stones.

Established in 1853, this crumbling cemetery sits forgotten on the corner of Church and Chapel in Gold Country.

Celebrating the transformation of trash into objects of beauty.

The long, arduous journey of the stones of the Abbey of New Clairvaux.

This lesser known Hearst estate is a fairytale village built from the stolen bones of historic European buildings.