Baalbek is a city in the Beqaa Valley of Lebanon, known for its ancient Roman ruins, including the Temple of Jupiter, Bacchus Temple, and Venus Temple. The temples are considered to be some of the best-preserved and most impressive examples of Roman architecture in the world. The site has been occupied since the 3rd millennium BC and has been a religious center for various cultures throughout history, including the Phoenicians, the Romans, and the Byzantines.

The Temple of Jupiter, built in the 1st century AD, is the largest and best-preserved temple at the site, with towering columns and impressive carvings. The Bacchus Temple, dedicated to the god of wine and fertility, is notable for its detailed carvings, while the Venus Temple, dedicated to the goddess of love, is notable for its well-preserved sculptures and reliefs.

Baalbek was designated as a UNESCO World Heritage Site in 1984 and continues to be an important cultural and historical site for Lebanon and the world. Visitors to the site can tour the temples, as well as the nearby museums, which showcase artifacts and information about the site's rich history.