The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

"The Hoppiest Place in the World" holds the world’s largest collection of bunny memorabilia and is a singular testament of a couple's devotion to all things Leporidae.

Panorama exhibition hall in old silent theater with a beautiful backyard garden.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

Once in a state of dilapidation, this candy-inspired fortress is now being revived.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

The thousands of shades on display — some toxic, others impossibly rare — are a library of more than just color.

This is the house that spite built.