This video shows a simulated walkthrough of Port Piraeus during the time of ancient Greece, which was the primary port of Athens.  The video initially flies over the site, and then walks through the area exploring the harbor where the famous Trireme war ships were docked.

[Note: The video was created by the channel “Invicta,” using a screen capture from the video game “Assassins Creed: Odyssey.”  The game is apparently very well-made, I’m impressed that it is able to interactively render such detailed scenes in real-time.]