A tree grown from astronaut seeds which were exposed to cosmic rays.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

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

An informal walk of fame in front of a Hollywood office building remembers a comedic great and his associates.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Where you can hail your favorite fictional commanders-in-chief.

A modern day curiosity cabinet.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

In this century-old literary safehouse, print is alive and well.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

The rusting remains of the largest assembled WWII fleet on the West Coast.

A rich history stashed behind an unassuming door in the heart of Gold Country.

This little-known relic crypt holds stolen parts of a Roman Empress.

The floorboard scrawling of a tragic madman is on public display outside a Paris hospital, much to the dismay of its opponents.

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

This museum in a Paris apartment gives a unique look at the iconic French singer's life.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

An off-the-beaten-path boutique stuffed with an eclectic collection of upcycled goods.