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=== Start in Jena ===

The best place to do this is in the tunnel underneath the Frankfurt-Dresden motorway, down the road from a hotel on a roundabout. If in doubt, then just get to the motorway, which heads east to west south of the main town. There are two junctions. One has a construction site just along from it (it looks like they're building a bridge over), and the other doesn't. You want to be at the one that doesn't, unless you're going to Frankfurt, or east. If you find yourself at the wrong junction (there's a big petrol station and a McDonald's), then you need to head west out of the petrol station, parallel to the motorway. Walk along past the MediaMarkt, and turn left. You'll see a bridge over the road, and there's a housing estate opposite. Cross the bridge and head up the hill through the housing estate. Keep going up the hill until you see the main road. Turn right, and walk along the road. The tram forks off to the left, but you should carry on down the hill to a roundabout with a hotel on it. You should be able to see the bridge now. If your lift's going the wrong way, you can quite easily get out at the services, and (south at least), there is an underground tunnel connecting the two service stations about half a mile north of the service station itself.

=== Trainride to Rasthof Teufelstal ===