There are still several Frankincense trees to find in the desert of Salalah. At about 45 minute drive into the North West direction you’ll find them next to the road. Make sure to make a cut and have smell.
If you are on the scout for the best frankincense in town make sure to check the color! The best quality is almost transparent with green glow. Did you know you cannot just burn this stuff, you can also make tea out of it and originally it was used as a gum to chew on. Go try it yourself. Frankincense has a medicinal power so you can never go wrong.