Seconded, the Seattle Connections museum is a hidden gem. It really is a living history museum run by volunteers who keep everything working. And so much of it is hands-on, you can make a call from a phone on one end of the building and hear the relays clicking as the call traverses exchanges from several different eras.
They also have an excellent YouTube channel.
https://m.youtube.com/@ConnectionsMuseum/videos
Seconded, the Seattle Connections museum is a hidden gem. It really is a living history museum run by volunteers who keep everything working. And so much of it is hands-on, you can make a call from a phone on one end of the building and hear the relays clicking as the call traverses exchanges from several different eras.