Dubrovnik, with its sparkling location on the Adriatic and bright orange sea of roofs is undeniably one of the most beautiful cities in the world. The fact that its old town is still entirely ensconced by a medieval wall ups the charm factor exponentially. The first fortifications of the Dubrovnik wall were built in the 8th century, during the Greco-Roman period. The majority of the structures were added in the 15th and 16th centuries.
The Wall Tour was fabulous. We got our cardio in while searing our eyeballs with stunning scenery—from the entrance off the Stradun (the old city's main street), all around the city's southfacing vista of the Adriatic, past the Old Harbor and up to Minceta tower, the highest point along the wall. It's around a 2 1/2 - 3 hour walk (unless you stop off at one of the scenic cafes tucked along the way). A great opportunity to up your Croatian history game, orient yourself, and buy local souvenirs. Photography nerds with a penchant for terra cotta will go mad with medieval roof lust.
Tip: Go early (8 AM). It will be less crowded and you'll be done and ready for a swim before the heat kicks in. Cost: €17. Enter by the Pile Gate on the western edge of the Old City. Hours: 8 AM - 7 PM.