The Qala'at Sanjil in Tripoli was built by Raymond St. Giles in 1101. It is located on a hill he called St. Peregrinus. It was besieged for nine years. In 1308 a Mamluk emir started with the construction of a citadel around the 14 meter by 70 meter fortress.

The Qadisha Valley in northern Lebanon is a World Heritage Site. From the fifth century it was a refuge for Christians who were prosecuted. At the top of the valley is the forest of the Cedars of God (Arz Ar Rab). There are about 300 cedars remaining and they are next to army barracks. All of Lebanon used to be full with these trees.

Originally Baalbek was built by the Phoenicians. later, the Greeks called it Heliopolis. In 25 BC, the town flourished under Roman dominion. During Nero's reign the Jupiter temple was built. Given the dimensions of 88 meters by 49 meters, this was the largest Roman temple ever. Of the original 54 columns, 6 are still standing. They are 2.5 meters in diameter. During the reign of Emperor Augustus it became an important religious center. In the 2nd century the smaller Temple of Bacchus (god of wine) and the temple of Venus were added. The temples were closed when Emperor Constantine recognized Christianity as an official religion in 313.