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Photo: User:Matthias Süßen, CC BY-SA 3.0 via Wikimedia Commons
Science museum with plenty of interactive exhibits such as an earthquake simulator. The main building is a huge steel shell designed by the Bremen architect Thomas Klumpp.
The Universum Bremen is a science museum in Bremen, Germany. Visitors are encouraged to interact with most of the approximately 250 exhibits. It receives on average 450,000 visitors annually.
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Unisee
Free swimming at a public beach in a recreation area. There is also a separate nude beach. Fishing, windsurfing, and boating are all possible. Many locals simply enjoy walking or biking on the path that runs around the lake.
A good overview of the history of Bremen City with a wide range of collections.
Natural History and Ethnographic Museum
Bremen City Park
Built on the site of the former city fortifications, this star-shaped park is the oldest public garden in Germany. It features scenic walking paths, colorful flowerbeds, and the historic "Am Wall" windmill.
Town Hall
This is one of the finest in Europe and has been included on the UNESCO World Heritage List. Building work started in 1410 and it is seen as an important display of the wealth and freedom of the city.
Cathedral of St Peter
Over 1,200 years old, its huge towered façade dominates the main square. The interior is also impressive, with some fine painted details on the ceilings. The cathedral was damaged by fire and lightning in the 17th century and also seriously impacted by bombings during World War II, and some of the damage is still visible, but it has been restored twice and is imposing, beautiful and well worth admiring for its form and the artwork and monuments that remain part of its exterior and interior. There is also a treasury displaying the collection of the cathedral. Entrance is free; for €3-€5 you can climb the Southern Tower, which offers nice views over the whole city. There are sometimes organ concerts in the Cathedral, particularly in the summer; see the Orgelsommer schedule for details. Admission for the organ concerts is €15, and the sound of the organs is great.