Heidelberg🇩🇪

The half-ruined red-sandstone palace of the Electors Palatine — built progressively 1294-1650, blown up by French troops in 1689 and 1693, struck by lightning, and deliberately left as a romantic ruin since the 19th century. The Friedrichsbau facade with its kings-of-Germany sculptures is intact; the Otto-Heinrichsbau next door is the dramatic ruin. The Heidelberg Tun (the world's largest wine barrel, 220,000 litres) sits in the cellar; the German Apothecary Museum occupies the Ottheinrichsbau ground floor. Reached by the Bergbahn funicular (€9 round trip from Kornmarkt) or a 10-minute zigzag walk up. €9 for grounds; €7 extra for interior tour.

The 1788 sandstone bridge across the Neckar — Heidelberg's most photographed view, with the Old Town rising on the south bank and the Heiligenberg climbing on the north. Two stone gate towers (the Brückentor) guard the south end, with a bronze monkey sculpture by Gernot Rumpf (1979) at street level — the brass mirror it holds is meant to remind passers-by that they are no better than the monkey. Free; pedestrians only since 1987. Best at sunset and floodlit at night.

The terraced footpath on the Heiligenberg hillside above the Neckar's north bank — a 2 km walk past terraced gardens, the Philosophengärtchen viewpoint, and uphill into the Heidelberger Wald forest. Hegel, Goethe, Hölderlin, and Eichendorff all walked here; the views back across the river to the Old Town and Schloss are the iconic Heidelberg postcard. Reached via the Schlangenweg ("snake path") from the Old Bridge. Free; allow 2 hours including the Old Bridge return; comfortable shoes essential.

The 1.6 km pedestrianized spine of the Old Town — running from Bismarckplatz to the Karlsplatz, lined with Baroque townhouses, the Jesuitenkirche, the university buildings, and dozens of cafes, bookshops, and student-favoured restaurants. One of Germany's longest pedestrian streets. Marktplatz with the Heiliggeistkirche and the Hercules fountain is roughly the midpoint. Free; the central section is densest on weekday afternoons, calmer in the early morning.

The Gothic Lutheran church (1398-1515) on the Marktplatz — for centuries shared between Catholic and Protestant congregations with a wall down the middle (until 1936). The 82m tower has been climbable to the public since 2009; €2 for 13th-century views over the Old Town and Schloss. Inside is restrained Lutheran-Reformed. Free entry to the nave; closed during services. The small market stalls around its base sell flowers, sausages, and regional produce on Wednesday and Saturday.

The university's 1712-1914 lock-up for unruly students — a cluster of small cells in a building on Augustinergasse where students sentenced for duelling, drunkenness, or breaking streetlights were imprisoned for a few days, often as a badge of honour. Walls and ceilings are covered floor-to-ceiling in students' graffiti, profile silhouettes, and dates. €3 entry; included with the University Museum ticket (€6 combined). Closed Sundays and Mondays in winter.

The 567m hill behind the Schloss — reached by the historic Bergbahn funicular (1890, two sections; €15 round trip from Kornmarkt to summit), with stops at the Schloss and Molkenkur. The summit has the Königstuhl Falconry, the Märchenparadies children's park, panoramic views across the Rhine plain to the Pfälzerwald, and the start of several hiking trails (4-7 km descents back into town). Most visitors stop at the Schloss; the upper section is a gentler half-day option.

Five connected squares (Bismarckplatz, Anatomieplatz, Universitätsplatz, Marktplatz, Karlsplatz) host the late-November to 22 December Weihnachtsmarkt — over 140 wooden chalets selling Glühwein (€4-5 with a deposit on the souvenir mug), bratwurst, gingerbread, and craft items. The Karlsplatz ice rink directly beneath the floodlit Schloss is the iconic shot. Open daily 11:00-21:00 (22:00 Fri-Sat); free entry. Smaller and prettier than Nuremberg, less crowded than Munich.