See the off-the-beaten-path sights that you only read in some of the most professional travel blogs and explore at your own pace with reading material. Uncover the secrets of the Bulgarian capital and its communist heritage in buildings, sights, stories and museum. Get ready for the most in-depth communist tour of Sofia!The main focus of the tour is Bulgaria’s Communist past, and you’ll see traces of that history everywhere you venture. Begin at the Monument of the Soviet Army before hopping on trolley — a relic of older times — to the National Palace of Culture, which holds the annual congress of the Socialist Party (and which displays a piece of the Berlin Wall).Next, meander down Vitosha Boulevard until you reach the former headquarters of the Communist Party, before heading to the site of the Georgi Dimitrov Mausoleum. The tour winds down when you head to the antique market around the Alexander Nevsky Cathedral, where you can pick up some Communist-era relics.