Situated in central Bavaria on the banks of the Danube, Ingolstadt is the youngest major city in modern Germany. The old city centre has many well-maintained Gothic buildings dating back to the medieval-era with the Herzogskasten (ca. 1255) and the New Castle (ca. 1418) being the most noteworthy. An old catholic town, there are several old churches also dating back to these times. Check out the Kreuztor (ca. 1385), one of the gates of the old city wall. There's more than just old buildings to enjoy however. Conspiracy theorists will be delighted to know that here was where Adam Weishaupt founded the now notorious secret society, The Order of the Illuminati, and literature fans will already know that here is the setting of Mary Shelley's 'Frankenstein', and naturally, there's a Frankenstein Tour too. Home to car manufacturing giant Audi, car lovers and boy racers alike should take their car rental over to the Audi Forum and Museum Mobile, where you can take a guided tour of the factory. So choose Sixt car hire for your time in Germany.