For my first day in Bonn, Lucas took me up a mountain (or a very large hill). It’s (I think) called Drachenfels (Dragon Rock), and it has a lot of legends surrounding it (mostly to do with dragons).
It was 30 degrees – 10 degrees hotter than the ‘hottest’ day I’ve experienced in 6 months! Definitely not hill climbing weather. The views were worth it though!