Ancient medieval fortress on Kaliakra cape, Kavarna, Dobrich, Bulgaria
El Morro, Paseo de la Princesa, Old San Juan gate, Puerto Rico
The South gate and Guardians of the Fisherman`s Bastion Halaszbastya at sunrise, Budapest, Hungary
Tianmen cave in Tianmen Mountain National Park, Zhangjiajie, Hunan Province, China
Portcullis, Caerphilly Castle, South Wales, UK
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