13881944 - At dusk, a visitor walks through McCaig's Tower atop Oban, Scotland; Oban, Argyll, Scotland14273047 - Castellana caves (Castellana Grotte), Apulia, Italy, Europe70518970 - Mouse Hole70486952 - 'View up to the sky from inside a cave;Alberta canada'70485933 - 'Patterns In The Smooth Sandstone; Arizona, United States of America'70485934 - 'Patterns In The Smooth Sandstone; Arizona, United States of America'70485931 - 'Unique Pattern In The Sandstone; Arizona, United States of America'71148406 - 'Medieval frescoes in the refectory of the David Gareja monastery complex; Kakheti, Georgia'70449820 - Broken Walls, Tuoi Sieng Prison, Phnom Penh, Cambodia70288715 - ruins of the historic adobe city of Tanuf, Hajar al Gharbi Mountains, Dhakiliya Region, Sultanate of Oman, Arabia, Middle East70127433 - Aged, Angle, Angles, Antiquated, Antique, Architecture, Bleached, Board, Boards, Building, Cabin, Calm, Cement, Chipped, Chipping, Close up, Close-up, Closeup, Color, Colour, Comfort, Concept, Concepts, Cottage, Cracked, Crackled, Cracks, Creak, Creaky, 71066426 - Pueblo Bonito doors and stone walls, Chaco Canyon Historical Park, New Mexico, United States70383970 - Blue and Orange Walls, San Jose del Cabo, Baja California Sur, Mexico70201240 - Steps leading towards an Entrance arch (Pune Darwaja) constructed in stone at Sihangad fort. Sinhangad, Pune, maharashtra, India.71308403 - Courtyard Entry With Sunlight, Joshua Tree, California, USA71308402 - Courtyard Entry With Sunlight, Joshua Tree, California, USA