1. The Summer Palace, also known as Yiheyuan, is a vast imperial garden in Beijing, China. It was originally built in the 12th century and served as a summer resort for the royal family. Over the years, it has been expanded and renovated by different emperors. The palace covers an area of 2.9 square kilometers and features several lakes, traditional Chinese gardens, and a variety of pavilions, bridges, and buildings.

Interesting facts about the Summer Palace include that it was almost entirely destroyed during the Second Opium War in the 19th century but was later restored during the reign of the Guangxu Emperor. It is also home to the Long Corridor, which is the longest covered walkway in the world, stretching over 700 meters and decorated with over 14,000 paintings.

2. The Summer Palace is open daily from 6:30 am to 8:00 pm (April - October) and 7:00 am to 7:00 pm (November - March). Their phone number is +86 10 6288 1144.

3. The entrance fee varies depending on the season, with the peak season (April - October) costing 60 yuan (around $9) and the off-season (November - March) costing 50 yuan (around $8). There are additional fees for specific attractions within the palace, such as the Tower of Buddhist Incense and the Marble Boat.

Transportation options to the Summer Palace include taking bus routes 209, 330, 331, 332, 346, 393, 375, 817, or 826, or taking Subway Line 4 to Beigongmen Station, which is within walking distance of the palace.