Carl Rasmussen’s magnificent web site: www.holylandphotos.org is a world-class website in general. Dr. Rasmussen provides very fine pictures, also of Patmos and the cities mentioned in Revelation. Go and take a look at Holy Land Photos. You will not be disappointed!
Here is an example from Dr. Carl Rasmussen’s Holy Land Photos: a photo of the remains of the Fortification Tower on Patmos. The fort was build about the third century B.C. It is significant that it was necessary to fortify this island.
Please, be sure to check Dr. Rasmussen’s Permission to Use page.