Here is a list of various locations around the world. Select only locations that are in the Eastern Hemisphere. If you click on any locations that are west of the Prime Meridian, you're out!
Yes, I know that technically if you go far enough west from the Prime Meridian you end up in the Eastern Hemisphere again, but you know what I mean. Whiners will be sent to Sporcle or rickrolled.
Edit: I don't think that's how you spell The Colosseum...