Hi, so I recently (as in last weekend) went to İstanbul, the biggest metropolis in Türkiye (and 4th largest by population in the world). Thirteen million people live in İstanbul. That does not count tourists, of which there are many. It is super kalabalık, like, to the max'n back. It is the only city in the world that spans 2 continents (Europe and Asia).
Here's a video of my antics in İstanbul! Enjoy!