"Yến" stream is a main way to "Huơng Tích" cave. From "Bến Đục", situated next to "Đáy" river, we walked about 1,5 km to "Bến Yến", then take a boat in "Yến" stream about 4 - 5 km to the "Bến Trong". Yến Stream (or Yến Vĩ) is a stream in tourist attractions of Hương Pagoda (Đục Khê village, Huơng Tích commnue, Mỹ Đức district, Hanoi).