Visit Historic Heidelberg
Heidelberg was spared bombing in the Second World War and has a beautifully preserved ancient city centre.
Heidelberg Castle and its gardens are well worth a visit. Here you can enjoy a breathtaking view over the city and the surrounding countryside, and even see the world's largest wine barrel, so big it has a dance floor built on top of it.
Numerous walking trails including the famous 'Philosopher's Way' can be found on the other side of the river Neckar.
The centre of the city is pedestrianised: here you can see ornate fountains, historic buildings and bridges, and some interesting churches and monasteries. It is even possible to visit the Gaol where misbehaving students were imprisoned in the middle ages and scrawled historic graffitti on the walls!