The Senckenberg is one of the largest natural history museums in Europe and the most child-friendly of Frankfurt's museums. The headline draw is the dinosaur hall — the original entrance hall built in 1907, with Diplodocus, T. Rex, Triceratops and the Iguanodons that for decades stood in matching school-textbook poses. Beyond the dinosaurs the museum is genuinely encyclopedic: an enormous mineralogy gallery, ethnographic collections from Africa and Asia, a serious collection of geological specimens, and the original 1907 dioramas of mounted African mammals from the great age of natural history collecting.
The whole museum has been gradually modernised since 2000 without losing its 19th-century cabinet-of-curiosities feel — many of the original glass display cases are still in use. It is in the university quarter just west of the Palmengarten, easy to combine with a botanical garden visit. Daily 9am to 5pm, weekends until 6pm.