Hasn’t it been your dream to go to Germany and visit Bochum coupled with other tourist spots ? There are really nice hotels to stay in Bochum - from Park Inn situated at - Massenbergstr. to art Hotel Tucholsky.
Cologne is a seperate city altogether. The places close to these which you can see on your way are Bonn and Dusseldorf. These cities are situated on the banks of the river Rhine. The river is famous for commercial transports and can be heavly crowded during peak months.
The Gothic church is huge there. Everyone who goes to Germany must see that. It is a sight to watch, extremely impressive.