We decided to stay in Istanbul instead of making the schlep down to Gallipoli: no disrespect to the fallen Diggers intended but it is a 4.5 hrs drive each way, weather crap, Monica not feeling well and very expensive. Instead, we did the short version of the Bosphorus River cruise then visited the UNESCO certified Hagia Sophia. It is a massive 6th century Roman basilica-turned mosque-turned museum, with beautiful Byzantine mosaics currently being restored. It was incredible.
Eminonu docks with Yeni Cami in background
Bridge over the Bosphorus, connecting Europe (L) and Asia (R)
It is huge inside: bigger than Grand Central Terminal
the "Blue Angel" mosaic, which was only recently restored