Besides being a great work of craftmanship, it's fun to the see the countries shown that were a part of the globe when the sphere was crafted.  And the lack of certain countries that are in the news that didn't exist (or were using an alias, e.g. Burma:-)).  Plus the acoustics in a hollow sphere are astounding.  Not many tourists are aware of it, so it is a wicked fun surprise when entertaining folks from out of town.