Between the parallel ranges of the Lebanon and Anti-Lebanon mountains lies the  narrow fertile plain of the Bekaa Valley, some 3,000ft above sea level. At first glance the Bekaa Valley appears to be a checkerboard of vineyards and fields planted with grain and vegetables. But a closer look reveals that the Bekaa Valley has several  fascinating historical and archaeological relics, including the majority of Lebanon's Roman temples.
 
 

The Bekaa is also a fertile plain due to two rivers that run in it: Al Assi river and Litani river. Al Assi is the only river in Lebanon that runs from the south to the north. that what gave it the name.
Anjar and Baalbeck are located in the Bekaa Valley.