Heidelberg, Freiburg or Baden-Baden: which southwest town to visit

Heidelberg, Freiburg and Baden-Baden are three different kinds of southwest German town, and the best one depends on what you want from the trip. The Heidelberg travel guide covers the castle and the old town, the Freiburg travel guide the Black Forest gateway, and the Germany guide covers the rest of Germany.

Heidelberg is the sightseeing town: a castle ruin, a famous bridge and a student old town, all within walking distance and an hour from Frankfurt. Freiburg is the outdoor town: a Gothic minster, wine hills and trains into the Black Forest. Baden-Baden is the slow town: thermal baths, a long park and an elegant, quiet center. You can use each as a day trip, but they reward different moods.

If you have one day and are based in Frankfurt, choose Heidelberg. If you have two or three days and like walking, choose Freiburg. If you want a rest in the middle of a trip, choose Baden-Baden for a night. If you have a week, put them on a single rail line and treat the Black Forest as the link between them.

Heidelberg is the one most first-time visitors know. The castle ruin on the hill, the Old Bridge across the Neckar and the pedestrian main street give a ready-made itinerary that you can see in a day. The old town is small and busy, with a university atmosphere in the cafés and lanes, and the Philosophers' Walk on the north bank gives the best view back across the river.

The strengths are access and density. Frankfurt is about an hour away, Mannheim about 12 minutes, and Stuttgart about 40 minutes. You can step off the train and be in the old town within 20 minutes. If you only have a day, our Heidelberg day trip from Frankfurt lays out the timing.

The weaknesses are crowds and price. In summer the old town is full of day visitors from late morning, and rooms near the main street are among the most expensive in the region. If you stay a night, compare the old town, Bergheim and Neuenheim in our where to stay in Heidelberg guide. Heidelberg is not the best choice if your main interest is hiking, wine or thermal baths.

Freiburg im Breisgau sits at the edge of the Black Forest, with a Gothic minster in the middle of the old town, small water channels called Bächle in the pavement and one of the sunniest climates in Germany. It is a university town with a relaxed, outdoorsy feel, and it is the best rail base for the forest.

The key advantage is the forest. A regional train reaches Titisee in about 40 minutes, and buses and trains run to many trailheads. The Kaiserstuhl wine hills are close, and Alsace is not far to the west across the Rhine. The old town is easy to see in a day, so two or three days lets you add the forest.

The cost is distance. Freiburg is further from Frankfurt than Heidelberg, about two hours by ICE, so it suits a trip that continues south or into Switzerland rather than a day out from the airport. Basel is about an hour away. Hotel prices are similar to Heidelberg's, with more choice outside the old town. Freiburg is not the best choice if you want a fairytale castle or only have one day.

Baden-Baden is a spa town on the western edge of the Black Forest. Its identity is the thermal water: there are historic and modern bath houses, a casino and a long riverside park, the Lichtentaler Allee. Many visitors come for the baths, a walk and a good dinner rather than for a list of sights.

The strengths are rest and setting. The town is small, green and hilly, and the baths give a half-day that no other town in the region offers. It sits close to the Black Forest hiking routes and to Karlsruhe, so it fits as a one-night stop between Heidelberg and Freiburg. Opening hours, entry rules and customs vary by bath, so check each bath's own site before you go.

The drawbacks are price, the station location and fewer classic sights. The main railway station is a few kilometers from the center and you take a bus or taxi into town. Hotels are among the most expensive of the three, and the town is quieter in the evening than Heidelberg or Freiburg. It is not a good choice if you want a lively student atmosphere or a ticked-off list of landmarks.

The three towns lie on or near the same north-south rail corridor, which makes a combined trip simple. Heidelberg and Mannheim connect to Karlsruhe in roughly 30 to 45 minutes, Karlsruhe and Baden-Baden are about 15 to 20 minutes apart, and Baden-Baden to Freiburg takes about 45 to 60 minutes by fast train. Direct services exist on some pairs, and others change at Karlsruhe or Mannheim.

For a one-way trip such as Frankfurt, Heidelberg, Baden-Baden, Freiburg and onward to Basel or Zurich, point-to-point saver fares are often cheaper than a pass if you book early. A rail pass can make sense if you add Munich, Cologne or other long legs. The Eurail pass guide shows how to compare them before you buy.

Remember Schengen rules if you continue to Switzerland or France from Freiburg. You can cross borders without checks inside the Schengen area, but days count toward the 90 in 180 limit; see our Schengen 90 in 180 guide if you are building a longer route.

Cost differs less between the towns than the experience does. Heidelberg and Freiburg have a wide range of lodging, from hostels and guesthouses to boutique hotels, and old town rooms cost more than rooms near the station. Baden-Baden has fewer budget options, and its most famous baths charge a separate entry fee on top of your room, so a night there costs more than the room rate suggests.

Timing also matters. Heidelberg's old town is at its busiest from late morning to mid-afternoon, so a night saves you from the worst of it. Freiburg works well on a weekday and is lively on Saturday market mornings. Baden-Baden is calm on a weekday and busier at weekends, when baths and restaurants fill. If you can, travel between Tuesday and Thursday for lower crowds and lower prices in all three.

If your budget is tight, base yourself in one town and use regional trains for the others. A night in Mannheim or Karlsruhe, both well connected, can be cheaper than a night in the old town of Heidelberg or in Baden-Baden. Check the total price at booking, including any city tax; our note on tourist taxes in Europe explains how these charges appear.

Start with how many days you have and where your trip begins. If you land in Frankfurt and have a day, go to Heidelberg. If you have two or three days and want hiking or wine, go to Freiburg and use it as a base for the forest. If you want to rest and soak after a week of trains, add a night in Baden-Baden between the other two.

Then think about what you like to do. Heidelberg is a town for walking between sights and sitting in cafés. Freiburg is for walking in the hills, taking regional trains into the forest and eating outdoors. Baden-Baden is for baths, long walks in the park and slow meals. If you like all three, a rail line links them, and a loop through Heidelberg, Baden-Baden and Freiburg takes four to five days.

Finally, check the season. Heidelberg is busiest from May to October and at Christmas. Freiburg is at its best from April to October, when the terraces and trails are open. Baden-Baden works year round, and winter is a good time for the baths. Book rooms early for summer weekends and the Christmas period in all three.