Okay, Lokrum Island is officially the bomb. It's a Sunday stroll + step back in time + swimming + cliff jumping + ice cream + peacocks + 19th-century fort + 12th-century monastery + weird, inland lake + a Game of Thrones Museum where you can sit on the *actual* Iron Throne. The island's shores are rocky but perfect for an afternoon of swimming or leaping off boulders into the refreshing Adriatic. Parks and picnic areas abound as well as colorful locals—peacocks, bunnies and a healthy sprinkling of "free body culturists" (aka nudists).
BYO: Swimsuit, water shoes/socks, towel, sunscreen, water. Ferries depart hourly from Dubrovnik's Old Harbour. Duration: 15 minutes. Tickets: 40 HRK / €5 per adult.