Bulgaria is a whirlpool of civilizations—there's so much to see and do here https://on.natgeo.com/2JRn0Qb

Bulgaria is a whirlpool of civilizations—there's so much to see and do here https://on.natgeo.com/2JRn0Qb 

https://twitter.com/NatGeoTravel/status/1130050491235414016