30 years ago, la geode already existed in Paris : https://www.lageode.fr/
I got good memories of this as a kid, and if you are in the area, it's definitely a must-do in the city. Especially since it's attached to one of the most fun science museums you'll get to visit with a lot of interactive bits.
I do want to get into the sphere to experience what 3 decades of progress have given us.