1. Baalbek is an ancient city located in the Beqaa Valley in Lebanon. It is most famous for its impressive Roman ruins, particularly the Temple of Bacchus and the Temple of Jupiter. Baalbek is often referred to as the \"City of the Sun\" due to its historical worship of the sun god Baal.

The Temple of Bacchus is considered one of the best-preserved Roman temples in the world. It was built in the 2nd century AD and is known for its intricate detailing and massive size. The Temple of Jupiter, on the other hand, dates back to the 1st century AD and is known for its enormous dimensions. The ruins of Baalbek also include other structures like the Temple of Venus, the Great Court, and the Hexagonal Court.

Aside from the Roman ruins, Baalbek is also known for its annual Baalbek International Festival, which features various cultural performances and concerts held in the ancient ruins.

2. The opening hours of Baalbek can vary depending on the season and current circumstances. It is recommended to check the official website or contact the Baalbek Visitor Center for the most up-to-date information. The phone number for the Baalbek Visitor Center is +961 73 666 359.

3. Ticket information and transportation options to Baalbek can be obtained from the Baalbek Visitor Center. They can provide details on ticket prices, guided tours, and transportation options to and from Baalbek. It is recommended to book a tour or arrange for transportation in advance, as it can be challenging to find public transportation directly to Baalbek.