If your trip to Ambarawa is all booked but your travel itinerary is a bit on the empty side, let us give you a few hints and tips.Stop by Rawa Pening Lake. It's one attraction you'll usually find on many travelers' to-do lists. If you still have space on that travel itinerary, Gua Maria Kerep Ambarawa and Ambarawa Railway Museum will keep you busy as well.