Location: Sofia, Bulgaria
Year Discovered: 2010
Est. Value: Unknown
How frequently do you enter a metro station rushing, hoping to find a historical museum? nearly never.
But Serdika II metro station in Sofia, which serves as both a stop for public transportation and a history museum, has a surprise in store for new visitors.
Excavators working on the metro station expansion found ancient relics from the Classical and Neolithic periods, which is how this fascinating story got started. The majority of these relics are now on display and available for free viewing.