Speyer is a quite beautiful city in Germany. Like most beautiful cities, it's flooded with tourist, on nice summer days.
Hitchhiking Out
South towards Germersheim
From the town center, walk 20 minutes east. There is a ramp, that works quite well to get to the surrounding villages.
Public Transport
There is a good bus network within the city, and train connections to Germersheim and Mannheim.
Places to Visit
The old town is very beautiful the cathedral is a UNESCO world heritage site. It's definitely worth a visit.