As fas as I know, the Canaries are the only place in the world to have tour guides with an official qualification in astronomical tourism. The first batch of 14 starlight guides qualified in 2011. Most of them are based on La Palma, although one lives on Tenerife. Two more groups have qualified since then.
Each of the new Starlight Guides has passed a course consisting of 120 hours of lectures (on astronomy, the island, and tourism theory) plus practical activities like stargazing and hikes. You can find details of the course here, (in Spanish).
You can get in contact with a starlight guide via http://www.iac.es/cursostarlight/pages/guias-starlight-acreditados.php