The first thing I will do is take a 1 and a half hour segway tour around Stockholm. It will visit all of the top tourist attractions in Stockholm.
The second thing I will do is go on a boat tour in Gothenburg.
Reasoning
First of all I think it would be really cool to ride a segway and at the same time I get see some of the greatest landmarks. Plus I really like boat rides so I can just sit back and relax well I ride around on a bout and see some cool attractions from the water.