This multiplex movie theater right behind the main train station (Raschplatz) shows some films in original English version. Tickets: €6-7, student €5. Tuesday is the cheap ticket day (€3.50-4.50). Seats are numbered and there is an extra fee (€1) for the "better seats" (Loge, the ones upper than the first few rows). For extra long movie, another extra fee (€0.50-1).
Herrenhäuser Gärten / Großer Garten
The world-famous baroque gardens of Herrenhausen were created in the 17th century to copy the Versailles Garden in France. A must see! Even in the winter one can still see its beauty, but it reaches its best at the end of spring until end of summer. There is also a glimmering cave decorated by Niki de Saint Phalle. The Berggarten, a botanical garden, is also very beautiful.
Erlebnis-Zoo Hannover
A very modern zoo, supposed to be one of the best in Europe. About 2,000 animals from all over the world live in six impressive zoo worlds. The ticket is pricey but should is worth it for a whole day's fun. Day tickets cost €29.20 for adults, for children 3–16 years: €19.20 and "young adults" 17-24 yr: €22.70. Better rates are available when you book onlin: https://www.zoo-hannover.de/english Open year-round. In wintertime, visit the WinterZoo - a charming Christmas market with ice show, ice skating, slides, food & drink, etc.
Hanover Aquarium, has an array of fish and also a rain forest inside. It is open from 10:00 daily. Tickets are usually available at a discount rate online: https://www.visitsealife.com/hannover/en/tickets/
Neues Rathaus
See the models of Hanover at four different points in history: 1689, 1939, 1945, and the present, and then take a sloped elevator (€5 adults, €4 children) to the dome for a beautiful view of the city.
Created by Niki de Saint Phalle in 1974, these three colorful, oversized sculptures on the banks of the Leine represent the beginning of Hanover's Sculpture Mile. While initially controversial, they are now a central landmark of the city and host Germany's oldest flea market every Saturday.
Gottfried Wilhelm Leibniz Universität Hannover
The main building was the winter palace of the Kings of Hanover. The summer palace was in the Great Garden complex. However, it was destroyed during the World War II. Now only one wall remains.