Tušpa was an ancient Urartian fortress on the eastern shore of Lake Van. It is situated on a high and steep rock, several kilometers west of the modern city of Van. Up there, you can see several tombs of Urartian kings, a couple of inscriptions (including an Achaemenian royal inscription), and many buildings from the Ottoman age.
I put some photos online, with a couple of notes. Unfortunately, when we visited the city, the museum was being renovated. The new webpage is here.