The Acropolis of Athens is an old fortress that is very popular among tourists. The cost of one entry ticket is about $24 (€20), which is quite a high fee. Moreover, there are so many tourists here, that taking a pic of this place without crowds is quite an uphill task. The ancient city of Ephesus in Turkey can easily compete with this site. Here, you can see a big complex of various constructions that are just as interesting as the views of its twin, with an entry ticket that will cost you much less at just $13 (€11).