Ancient ruins: remainders of ancient city of Serdika below Sofia, Bulgaria, shown underground, connected to the metro

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Size: 8192px × 5464px
Location: Sofia, Bulgaria
Photo credit: © KMphotos / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: ancient, city, historic, ruins, serdica, serdika, stone, stones, walls