Fodor's Expert Review Globe Museum

Across the street from the Café Central, the beautifully renovated Palais Mollard has a rare collection of more than 240 terrestrial and celestial globes on display in its second-floor museum—the only one of its kind in the world open to the public. The oldest is a globe of the Earth dating from 1536, produced by Gemma Frisius, a Belgian doctor and cosmographer. On the ground floor is a small but fascinating Esperanto museum, which explores the history of Esperanto and other planned languages. Both museums are run by the Austrian National Library.