We visited Terebovlia to see the castle ruins that stand on a hill. During our visit the ruins had been just "attacked" by tourists from Poland. They were leaving while we were approaching the ruins. In any case, the place is very picturesque, so it's best to watch it without the crowds of tourists.
The ruins are not protected, everyone can access them. It has well-preserved walls and several buildings. There is also an abandoned park behind the castle.
Getting there: By bus or minibus from Ternopil, about 45 minutes to go.