It’s a great idea to take a daytrip from Trebinje to Kupari if you want to see something unique and enjoy a little beach time as well. Only 5 kilometers from Dubrovnik, Kupari was a former military resort for the Yugoslavian military. Though the beach is still beautiful, the former hotels lay in ruins. If you’re interested in abandoned buildings, you’ll have a fantastic time exploring this area.
There are a couple of ways to get to Kupari for a daytrip. You can take a bus from Trebinje to Dubrovnik, and then take a local bus to Kupari. Or you can drive a rental car. Hitchhiking is also possible, as Kupari is only about 25 kilometers away from Trebinje.