Botanischer Garten der Universitaet Heidelberg

We waited for 45 minutes even though we were

Please AVOID their airport shuttle. The hotel staff push it as an add on during check in, and offer the "simple" of prepayment option. Cost is listed as 6 Euros; but costs 9 Euros per person - they do not mention the added fees. They also do not tell you that the shuttle stops at the road and not in the hotel foyer. And that the shuttle is a hit and miss (we missed it even though we were at the outside, in the rain, at that time!). And the prepaid tickets are not refundable - even though they had these red "event" tickets in a box and could have easily returned them! Uber to the airport: 12 Euros; taxi: 23 Euros - we took both options. So, avoid the shuttle! Restaurant staff and food: excellent!