I got the chance to explore the famous Los Feliz murder mansion a few months ago. Long story short, this Spanish-style home was built in the 1920s. Back in the late 1950s, a doctor lost his mind, bludgeoning his wife with a hammer, trying to kill one of his children with the same fate, and committing suicide via a mixture of drugs:

Curbed has a couple of great posts on this house, and quotes: