Located in the south central part of the Chinese mainland, Hunan has long been known for its natural beauty. Hunan is surrounded by mountains on the east, west, and south, and by the Yangtze River on the north. Hunan's mixture of mountains and water makes it among the most beautiful provinces in China. For thousands of years, Hunan has been a major center of Chinese agriculture, growing rice, tea, and oranges.
When to go
Hunan has a humid, subtropical climate. The monsoon rain falls mostly in April, May, and June. July and August are uncomfortably hot and humid. The best time to visit is in the fall, when temperatures are cooler and the rainfall lighter. For persons who live in cold northern climate, traveling to Hunan in the winter can be pleasant. After all, any place that grows oranges can't be all that cold. Low temperatures in winter are usually above freezing, with daily highs around 10C. Annual rainfall is around 1,250 - 1,750 millimeters (49.2 to 68.9 inches). Northern Hunan has more climate extremes than southern Hunan. It can get colder in the winter and hotter in the summer.
Historic Changsha, one of China's famous cultural centers, is the capital of Hunan Province. It is also a tourism center, offering its visitors many historical sites and other places of interest.

What to see
The headspring of life, Dongting Lake, is frequently mist-covered in the early morning. It is the second largest lake in China. Yueyang City, located on the shore of Dongting Lake, is home to one of China's three famous towers. Yueyang Pavilion was originally built during the Tang Dynasty (618-907). The present pavilion is of recent reconstruction, built in the style of the Song Dynasty (960-1279).
In 1982, China established its first national forest park. Zhangjaijie National Forest Park was established in a particular scenic area in northwest Hunan. The park is especially known for its quartz-sandstone rock formations, bare stone sculpted by nature and set among green trees and frequent clouds.
Info from:
www.travelchinaguide