Turkey's family activities span Mediterranean beach access, Byzantine architecture, and the most dramatic cave city landscape in the world. The Cappadocia balloon flights at dawn — over the fairy chimney rock formations as the sun rises and the valley fills with hot air balloons — are the country's most photographed family experience and engage children through the visual of dozens of balloons simultaneously. The Ephesus archaeological site's Library of Celsus facade, the marble-paved main street, and the functioning ancient public toilets (which children find simultaneously historic and hilarious) make it one of Turkey's most accessible and most engaging family heritage experiences. The Istanbul aquarium — the world's longest aquarium tunnel at 80 metres, with 15,000 sea creatures — and the Rahmi M. Koç Museum of transportation and industrial history in Istanbul add urban family registers. The Pamukkale calcium terraces and thermal pools for natural science and the Dalyan river boat trips for loggerhead turtle encounters extend the family geography.