During a recent trip to Romania (Oct 2017), there were 3 areas/sites that I really enjoyed. The area around Medias is known for its wonderful fortified churches. While we didn’t visit any, they were very prominent features in the regional landscape.
The Transfaragasan Highway is reputed to be the greatest road in the world for driving because of all of its many switchbacks and wonderful scenery. And it is a lot of fun to navigate. When we drove it, there was quite a bit of snow on top. This activity is highly recommended.
We also visited a hilltop fortification between Sighisoara and Brasov named: Cetatea Rupea.
This medieval castle is beautifully sited and not far from the highway. It has been heavily restored and there is a small charge to enter. It is a great place to stretch your legs and get some exercise. There are nice views of the surrounding countryside from the top.