This ancient castle has been abandoned since the Edwardian conquest of Wales.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

The haunting ruins of Jack London's dream house.

Believe it or not, this is the final resting place of the man who created the Odditorium.

340 bicycles, 65 feet high.

A tribute to one man's legacy of improving the accordion's reputation.

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

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."

Massive prehistoric mammals used these stones as oversized scratching posts.

The southernmost outpost of the Russian Empire in colonial America.

This whimsical seashell-shaped place of worship was designed to blend into its surroundings.

The mysterious round rocks of Schooner Gulch.

A local dialect born in the late 19th century is only spoken in this isolated California valley.

Experience Larry Spring's self-taught "common sense" laws of physics.

A trash dump made beautiful by nature's power.

This massive redwood tree has a hole in the base big enough to drive through.

An optical illusion found amid a logged redwood forest.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

Commonly referred to as the most photographed Victorian home in the United States.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

The key to turning shifting dunes into the green oasis of Golden Gate Park.