Melissani Cave, on Kefalonia Island in Greece, features a sky-blue lake within the cave. The lake is shallow and clear, and is covered with stones at the bottom. The cave was rediscovered in (In Greek mythology, Melissani was the cave of the nymphs.
Great wall of China. My eyes will never forget this site. As a child I thought it was the most wonderful place to sit and dream. China you will for ever have a place in my heart! for your travel bucket list