The Museum of Frankincense Land is the best indoor introduction to Salalah and Dhofar, explaining why this green corner of Oman mattered far beyond its size. Frankincense, ports, archaeology, and Indian Ocean trade all come together here.
The museum sits within the Al Baleed archaeological area, so it works best before or after walking the ruins. Visit early in your stay and the rest of Salalah's wadis, tombs, and coastal sites make more sense.