Is there another city under Sofia? From the secret Party tunnels supposedly running under the demolished tomb of the communist leader Georgi Dimitrov, to the infrastructure of the beloved heating utility company Toplofikatsiya, we examine one of the most believed urban legends. With the help of: Ivan Bakalov. Here you can see photos from his walk in the tunnels under the Mausuleum in 1991. Radomir Mirchev of Vermin Games and Stalker LARP Bulgaria and  other lovers of the underground.