Lopud Island is famous for having the one of the best beaches in the Dubrovnik region. Sunj (pronounced shoon) beach is certainly the best beach in the Elafiti Islands. It's composed of fine, white sand (extremely rare in Croatia) and is backed by lush, green hills. Naturally it gets busy on summer days when tour boats arrive and everyone in the region with a motorized vessel heads out there for a swim. Yet, when the boats leave and off-season, it's the Adriatic at its best.
The main settlement is the port of Lopud which has a number of cafes, restaurants and hotels, but inland there is little development--just luxuriant vegetation. Lopud Island was once an important naval center, boasting two monasteries, 30 churches and a number of noble palaces but little remains today.