For those of us reading Revelation this week here is a map showing the location of the 7 cities the letter is written to (their names are in yellow with red dots). They are all in modern day Turkey.
Scholar Craig Koester has a neat little website which allows you to tour around each city and see photographs of the archaeological sites. Or you can actually go there with this tour company that specialises in "sacred destinations."
[Map from here, but I copied it here to spare you the crazy stuff.]