Limestone karsts in a cove on Hong Island, off the coast of Krabi, Thailand. Not to be confused with a different, but equally picturesque, Hong Island, in nearby Phang Nga Bay.
Sony A7r3 with Sony 100-400mm f/4.5-5.6 GM and circular polariser. 4x stitched vertical frames, each at 100mm, f/10, 1/100s, ISO 50.