Just a note, don’t go when it is even close to convenient, you are in a hurry, don’t want to walk a million miles, or don’t want to be with other people, because this place is popular. It is also worth it.
The observatory is built on Mt. Hollywood, the same one that has the big Hollywood sign, in 1935. From its inception it was open to the public for free. It was meant to make astronomy approachable and accessible to the masses and the masses show up en masse.
The copper domes really do house legit telescopes that aid real-life science (see what I did there?). Smart people doing smart things that I don’t understand, work there. I didn’t work there, I just looked there.The city, the sky, and the building. The art deco scalloped smooth lined solid colored building, the pastel fading multicolored shapeless sky, and the staccato jumbled lit up city.