I love Eartha! We planned this excursion on our way down the coast and I am happy we did. We watched it turn for about 20 minutes from both the ground floor and the third floor. The mechanism is really cool! It's movement mimics Earth's rotation and revolution so you'll get a view of other places as it turns.

To be clear, this is a large globe in the lobby of a workplace. It's not really a museum although there are some plaques. It's only open on weekdays til 3 because it is a real office. So keep that in mind if you visit, but it is really cool (and free) if it fits with your schedule!