Near Trsteno Arboretum. With a stay at Sun Gardens Dubrovnik in Dubrovnik, you'll be 8.3 mi (13.4 km) from Dubrovnik Ferry Port and 8.3 mi (13.4 km) from Gruz Harbor. This luxury hotel is 9.2 mi (14.7 km) from Pile Gate and 9.4 mi (15.1 km) from Rector's Palace.