Al-Baleed is the most significant historical site in southern Oman — a UNESCO World Heritage Site preserving the ruins of a medieval port city that was the commercial heart of the global frankincense trade from the 12th to 15th centuries. The sprawling excavated site sits on the eastern edge of Salalah, close to the sea, and includes the remains of mosques, palaces, warehouses, and the city walls that once enclosed a prosperous trading metropolis.
The Museum of the Frankincense Land on the grounds is one of the best museums in Oman, with well-presented exhibits on Dhofar's natural history, pre-Islamic culture, the mechanics of the frankincense trade, and the historical connections between Arabia and East Africa. Allow at least two hours for the park and museum combined. Free entry; open Saturday–Thursday.