What’s hidden under Sofia might just be the coolest part. From above, it’s just another city block. But beneath Sofia’s streets, 2000 years of Roman history unfold. Serdica still breathes under Nezavisimost Square - insulae, baths, basilicas, and the decumanus maximus tracing the bones of a forgotten empire. Modern life glides above ancient roads. Look closer-the past is right beneath your feet. #sofia #architecture