If it is worth to travel to Bremen?

Of course! Best, you stay at the Hotel Hanseatic Bremen, right in the middle of the city centre of Bemen. Because Bremen is the city of short routes, you can reach from the hotel nearly all the sights on foot.

* The Schnoor quarter
* Theater am Goetheplatz (theatre)
* Bremer Kunsthalle (art museum)
* Bremer Roland statue
* Überseemuseum
* Weser Stadion (Open Air concerts, Werder Bremen)
* Stadthalle (Bremen Arena)
* Messezentrum (exhibition centre)
* Beck &Co. brewery

Bremen is also well explored by bike or by public transport:

* Daimler Space-travel centre
* Bürgerpark
* Wümmewiesen
* Worpswede
* Universum

Of course there are diverse highlights: 

* 6-day-race in january
* Whine festival in september
* Freimarkt (free marktet) in october
* Christmas market in december
* Large Riding tournaments