karlukovo_bulgaria_the-eyes_iordan_hristov_wm-5294

Bulgaria has some superb karst formations like the ones found here in Karlukovo Cave — the one pictured here is called the “God’s Eyes”
Photo credit: Iordan Hristov/www.naturemonitoring.com

Bulgaria has some superb karst formations like the ones found here in Karlukovo Cave — the one pictured here is called the “God’s Eyes”
Photo credit: Iordan Hristov/www.naturemonitoring.com

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