Doha is a really convenient stopover, as the home airport for Qatar Airways, a top world carrier and member of oneworld. Their first class lounge in Doha is amazing, and even features pieces from the Museum of Islamic Art’s collection.
I found just two days in Doha to be perfect, but if I had it to do over again I’d do four nights… two dedicated to a museum visit and two for The Ritz-Carlton Sharq Village & Spa.