Step into a world of stalagmites and stalactites at atta cave germanys largest dripstone cave and then visit medieval greifenstein castle this day trip from frankfurt includes a tour of the spectacular cave near attendorn plus a walking tour of greifenstein castle marvel at the 12th century ruins and then visit the sites german bell museum where more than 50 traditional german bells are displayed numbers are limited to 14 on this small group tour ensuring youll see all the sights wi