A geology professor from the University of South Florida discovered a 5600-year-old stone bridge in an ancient cave ... As ...
This stone bridge over the Tiber embodies both Roman architectural ... is the presence of a small additional arch in the centre, designed to reduce water pressure during floods.
"Over this river there is a very fine stone bridge, so fine indeed ... the "Lugou River is also called the Heishui (Black Water) River." In the local dialect in ancient times, lu (reed) meant ...