High atop a ridge in the Balkan Mountains sits a striking monument to Bulgaria’s fraught past http://on.natgeo.com/2nQYrXg pic.twitter.com/jh6gfDegz1

High atop a ridge in the Balkan Mountains sits a striking monument to Bulgaria’s fraught past http://on.natgeo.com/2nQYrXg  pic.twitter.com/jh6gfDegz1

https://twitter.com/NatGeoTravel/status/961283421216522240