The app’s interface was a beautifully crafted map of Baku, overlaid with layers of history. When she tapped the Maiden Tower, a translucent image of the ancient fire‑temple appeared, its flames dancing. She could walk through the old bazaar, hearing merchants shout the prices of spices in Ottoman Turkish, while modern traffic roared in the background. A timeline slider let her glide from the 19th‑century oil boom to the present day, each era rendered in vivid detail.