Pasadena’s sprawling Craftsman masterpiece, the Gamble House, has been called one of the 10 homes that changed America.

Now, a video from Curbed gives a peek inside the Los Angeles architectural icon. It highlights a few of the elements that make the house exceptional and offers a brief tour and primer for those who haven’t been lucky enough to visit in person.

Designed by brothers Charles and Henry Greene in 1908, the stately house was created as a winter home for David Gamble, a Proctor & Gamble heir, and his wife, Mary. The house was designed in the Arts and Crafts style, which, as the name implies, emphasizes incredible craftsmanship.

The video shows myriad examples, including intricate stained glass windows and woodwork that allows for secret doors to seamlessly blend into the walls of the house.

Since 1978, the Gamble House has been owned by the city of Pasadena and run by the University of Southern California. It operates as a museum with regular public tours.