Thousands of migrating monarchs overwinter clustered amongst the eucalyptus trees.

This edible park is open to any and all foragers.

The final resting place to 300 Victorian-era pets hides inside the city park.

All that's left of the quintessential "cabin in the woods."

The longest continuous lava tube in the continental U.S. offers 2.5 miles of dark explorations for the adventurous.

Hollowed out cedar log tubs set in an ancient towering forest.

Dramatic river bend surrounds a natural red-rocked pedestal.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Started as a kitchen garden, now the second largest botanical garden in the world.

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

The world's only museum devoted to the wonders of fluorescence.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

This Alamo Square mansion is rumored to have hosted satanic rituals and other occult practices.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Eat a tasty meal in the house where John Steinbeck was born.

Golden Gate Park's historic collection of plants.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

"The House That Love Built" is shying away from "The House That Ghosts Love."