National Museum Hannover
Visit the Landesmuseum Hannover. There is no entrance fee on Friday, 4/9 from 2pm-5pm. The museum has several collections: a collection on natural history, an ethnological and an archeological collection, a collection of paintings and sculptures, a copperplate cabinet and a coin collection: www.landesmuseum-hannover.de/en/
Herrenhausen Gardens
Discover the Herrenhausen Gardens including the Herrenhausen Palace, the Grotte by Nikie de Saint Phalle and the botanical treasures of the Berggarten: www.hannover.de/en/content/view/full/448652
Eilenriede
Want to relax after the conference? Explore Europe's largest city forest in the heart of Hannover: www.visit-hannover.com/en/Sightseeing-City-Tours/Gardens-Recreation/The-Eilenriede
Roter Faden („Red Thread“)
This is a 4,2 km long city tour that you can do on your own. Simply follow the „red thread“ that is painted on the pavement: www.visit-hannover.com/en/Sightseeing-City-Tours/Sightseeing/City-tours/The-%22Red-Thread%22-Hannover
Museum August Kestner
Visit the Kestner Museum which offers collections on Egyptian art, cultures of the antiquity, applied arts & design and numismatics. On Friday the entrance is free: www.hannover.de/en/Tourism-Culture/Culture-Leisure/Museums-Galleries/Museum-August-Kestner