Priene is a great location next to the mountains. It's a vast area that will take you hours to see. The map alone will show that. Its layout is easy to walk around too, like a well-designed town. The main problem is that that most of what remains are in ruins, and what surprises you is that most of the building blocks are still around, waiting for some money and time spent on getting this place put back together. Potential is huge here as none of the huge pieces were taken away to build something new later, a common thing with so many antique sites. So as there is a lot of rubble what's really worth seeing now are the few large columns with a lovely background (see pic) and the small theater with VIP seats where nothing seems to stop you from actually taking a quick seat (the moral question if you should is all yours). If you have the Aegean card then this place is a nobrainer but even if not it's worth the time and money to visit.