From the game Baldur's Gate, I give you, Baldur's Gate.
To show you just how big this area is, I'll post another picture. The party of characters are outside Sorcerous Sundries. It's around the middle-right of the map.
You can enter 99% of the buildings there and it's a City filled with things to do. It even has a sewer network
It's not really "beautiful", but in terms of "things to do", it's really high up.