Near Kharkhorin, a two-foot long stone penis attracts steady streams of curiosity-seekers. The 'phallic rock', which points erotically to something interestingly called a 'vaginal slope', is hidden up a small valley, about 2km southeast of Erdene Zuu Khiid. A giant penis, painted onto a sign by the road, points you in the right direction. Legend has it that the rock was placed here in an attempt to stop frisky monks, filled with lust by the shapely slope, from fraternising with the local women.