I was in Sofia during a spring trip through the Balkans and decided to a day trip to Plovdiv knowing that it had some Roman History and might in fact be related to Spartacus. Glad I did and glad I found this tour. It was great and very informative. Lots of Bulgarian and Roman History (not too sure about Spartacus) The guide Adelina was awesome and extremely knowledgeable. If you’re in Plovdiv or passing through there is no reason why you shouldn’t do this tour. it’s absolutely worth it! (I mean of course being free. you should still leave a tip though) but I would have paid for it too.