This is the spider house at Los Angeles Museum of Natural History. It's an additional fee to enter ($6 extra on top of the $15 admission). You have to schedule a time to visit and they run times every 30 minutes.

It's interesting. You walk around a track and see all the spiders in their nests. The problem is they let far too many people in at the same time so you can't move and you can't enjoy the spiders.

Just for context, none of these are venomous spiders and they're all dorment in their webs. Some were very massive and some absolutely tiny.