This bizarre 'sticky' waterfall in northern Thailand has become an unlikely tourist attraction - with people challenging themselves to walk barefooted up its steep rocks.<br /><br />Water cascades down the 50ft high hill in Chiang Mai but instead of the smooth rocks being slippery, their unique surface actually grips the skin. <br /><br />Minerals in the stream, including calcium carbonate and limestone deposit, have formed a sticky coating on the surface to the rocks which now allows people to climb up the waterfall with bare feet without slipping.<br /><br />Hundreds of holidaymakers visit the sticky waterfall every week to challenge themselves to climb up the rocks - cooling off in the refreshing mountain water and enjoying the beautiful and peaceful scenery.<br /><br />Footage captured from Bua Thong waterfall shows tourists of all ages climbing up the slopes on July 21.
