This tour takes you from hanoi to the natural wonderland of northwestern vietnam with ba be lake and ban gioc waterfall ba be lake is well known for an over 50 hectare freshwater lake in the altitude of 145m above the sea level created by the confluence of three river tributaries after earthquakes tens of millions of years ago in contrast ban gioc the worlds fourth biggest border crossing waterfalls is attractive for its picturesque painting of blue sky great limestone mountains and stunn