My friend and me took RYANAIR from Spain to Sofia for a weekend stay. Time was limited and we decided to do the sightseeing bus tour. Price is really attractive, only 20 levas /about 10 euros/ for a loop of 45 minutes or an hour. We were given a free map and offered a free beer or a bottle of water. We were gladly surprised that instead of impersonal audio recording with headphones we had a real guide that introduced us to the main landmarks in Sofia with a great sense of humor. The guide took advantage of the traffic jams and the stops at the lights to give us also some really useful tips about taxis, music and habits in Bulgaria and made the journey really pleasant.
Highly recommendable!
Valia Asenova, Spain