Travel to Heidelberg
The nearest airports are Frankfurt am Main and Stuttgart, both of which provide easy access to Heidelberg via DeutscheBahn. From Frankfurt, it takes about an hour; from Stuttgart, between an hour and an hour and a half.
Heidelberg is well served by both regional and IC(E) trains; consult DeutscheBahn’s website for prices and schedules.
Walk directions from the train station to the venue:
Googlemaps is your best bet for directions; if you need any more specific details, contact the local organizer, Andrea Breard.
Very close to the conference venue is a guest house, where the invited speakers will be staying.
Via Booking.com you can find a range of options from backpacker/youth hostels to deluxe hotels with views of the river, the mountains, and the castle.