Towering over the Altstadt, Heidelberg’s ruined Renaissance castle cuts a romantic figure, especially across the Neckar River when illuminated at night. Attractions include the world's largest wine cask and fabulous views. It's reached either via a steep, cobbled trail in about 10 minutes or by taking the Bergbahn (cogwheel train) from Kornmarkt station. The only way to see the less-than-scintillating interior is by tour, which can be safely skipped. After 6pm you can stroll the grounds for free.
Once you arrive up top, you'll be struck by the far-reaching views over the Neckar River and the Altstadt rooftops. Show your ticket to enter the Schlosshof , the castle’s central courtyard, which is framed by reconstructed Gothic and Renaissance buildings with elaborate facades. The most eye-catching belongs to the Friedrichsbau, which is festooned with lifesize sculptures of kings and emperors.
You can't miss the Grosses Fass , the world's largest wine cask, with a capacity of about 228,000L. Also worthwhile is a spin around the surprisingly interesting Deutsches Apotheken-Museum .
