Left untouched since a double murder-suicide in the 1960s, Los Feliz murder mansion remains a neighborhood mystery.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

These aggressively sustainable art homes look like something out of 1970's science fiction.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The headquarters of the famous Yale society.

The ancient past meets the retro-future at these dinosaur tracks that are protected by a geodesic dome.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

While many places make the claim, the Library of Congress says this restaurant is the birthplace of the hamburger.

The former home of Samuel Clemens and family remembers the happiest period of the author's life.

This impressive tunnel was dug entirely by hand over the course of 36 years.

Thousands of turbines whir at at the origin of North American wind power.

A Looff creation in Santa Monica best described as “a California-Byzantine-Moorish-style fantasy.”

An offbeat angle on the ocean viewed through an antiquated lens.

Giant origami crease patterns engraved in Santa Monica intersections may even be visible from space.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

The quiet canyon has a tumultuous history involving a doomsday cult.

The Los Angeles flood disaster that took 400 lives and ended the career of William Mulholland.

Each year these high desert hills are absolutely covered with poppy flowers in a surreal show of nature.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.