Gerhard
Google
Liseberg is an amazing theme park in the middle of Göteborg. You can get here with the tram or bus or even just walk from the train station.
The three coasters Helix, Valkyria and Balder are not only world-class, but offer a well-rounded and varied ride lineup. Helix is a must-do and one of the best coasters I've ever been on. Even the smaller coasters Luna and Lisebergbanan were unexpectedly great!
Liseberg also has some really strong flat rides. Loki is outstanding, but there is also a nice drop tower, Gerstlauer SkyRoller, S&S Screamin' Swing and many many more.
One thing that is really annoying though is the lockers for Valkyria. I was visiting the park alone so I had to put my bag there to ride. I booked a time slot with the virtual queue but couldn't make that time slot because I was told that I had to put the bag into those lockers. However, all of them were occupied. Also the passage between the lockers is super tight and you can't get through at all even if there is just a few people there. Definitely feels like a retrofit and needs a better permament solution.
But other than that I really have nothing to complain about here in Liseberg. Definitely worth the trip!