Two days is the sweet spot for Heidelberg. One day is enough to see the castle and walk the Hauptstraße, but a second lets you slow down, climb a little higher, visit a museum and eat dinner without watching the clock. The city is compact, so this plan is organised by mood and light rather than by distance. Wear shoes with grip, because cobbles and hillside paths are the real obstacle here.
Day one, morning: the castle
Start early at Heidelberg Castle, before the tour groups arrive. Take the lower funicular from the Kornmarkt station, or climb the path and steps if you want the exercise. Your ticket covers the courtyard with its Renaissance facades, the Great Vat in the cellar, the German Pharmacy Museum and the Great Terrace with the view down over the roofs and the river. Allow two to three hours. Interior rooms can only be seen on a guided tour, so decide when you arrive whether to add one.
Day one, midday: the Old Town
Walk down into the Altstadt and aim for the Marktplatz, where the Hercules Fountain and the Church of the Holy Spirit stand face to face. The church is free to enter in the main and worth a quiet look. Lunch is easy in the lanes around the square, and the long pedestrian Hauptstraße, one of the longest car-free shopping streets in Germany, runs on from here. Remember that most shops close on Sundays, which makes a Sunday walk quieter and a Sunday shopping trip pointless.
Day one, afternoon and evening: the Old Bridge and the Philosophers' Walk. Cross the Old Bridge, touch the Bridge Monkey sculpture for luck at the town end, and continue up the Schlangenweg, the steep winding path that leads to the Philosophers' Walk. This is the best free view of the castle and Old Town, and it is at its most golden in the late afternoon. Walk back across the bridge for dinner at a brewhouse or a tavern. The Beer and Food entry covers the main places to eat by the river.
Day two, morning: choose your altitude
If the weather is clear, ride the Bergbahn funicular beyond the castle, through the Molkenkur station, to the Königstuhl summit for the widest view over the Neckar valley and the Rhine plain. Leave extra time for the second section of the ride and a snack at the top. If the day is grey or wet, switch to the Kurpfälzisches Museum, a fine collection of regional art and archaeology in a baroque palace in the Old Town, or the Student Prison, a very short, very entertaining stop in the university quarter.
Day two, afternoon: a second sight
The easy choice is the Student Prison and the university area. The wider choice is a half-day trip to Schwetzingen Palace, a short ride west by bus or regional train, where the summer palace sits within a baroque and landscape garden with temples, a mosque-shaped folly and an orangery. Palace rooms are visited by guided tour, while the garden can be wandered at will. In winter the garden is open and palace tours run on a reduced schedule, so check ahead.
Day two, evening: slow down
Finish with a river cruise in season, or with a long dinner in the Old Town. The Neckar boat trip is a gentle way to see the castle and bridge from the water, and in the Christmas market season the evening can be spent among the wooden huts on six squares. If you are visiting in the colder months, plan outdoor sights for the middle of the day and keep museums and meals for the dark hours.
Where to base yourself
For a two-day stay, sleep in or beside the Old Town so that you can walk everywhere and return to your room for a rest between the castle and dinner. Goldener Falke and Hotel Hackteufel are small Old Town addresses, the Europäischer Hof is the comfortable ring-road option, and Die Hirschgasse is a quiet historic address across the bridge. See the where-to-stay guide for the full comparison.
Getting here and around
Trains from the Frankfurt area and from Stuttgart arrive at the main station, from which a bus or tram takes you to Bismarckplatz at the edge of the Old Town in a few minutes. Nothing in the centre needs a car, and the funicular, trams and your feet cover the rest. If you plan to see several museums, ask at the visitor office about the city card, which bundles the castle, the funicular, some museums and regional public transport.
A last tip
Do not try to fit in everything. Heidelberg's pleasures are about atmosphere: the castle above the river, the lanes below it and the bridge between them. Leave a gap in each day for a coffee, a bench by the river and the view, and you will leave feeling you have seen it properly.
