The Park has an area of more than 69 hectares, with a lake that covers more than half of the entire Park. At the center of the Park is an island called Qinghu Island with a highest point of 32 m. In the north of the park there is a large pool called the Taiye Pool connecting the two other pools, which are called the Middle Sea and the South Sea respectively. Therefore the Taiye Pool is also called the Beihai.

Beihai literally means "Northern Sea". There are also corresponding "Central" and "Southern Seas" (Zhongnanhai). The complex of buildings around Zhongnanhai houses China's paramount leaders.

The Beihai Park, as with many of Chinese imperial gardens, was built to imitate renowned scenic spots and architecture from various regions of China; the taihu lake, the elaborate pavilions and canals in Hangzhou and Yangzhou, the delicate garden structures in Suzhou and others all served as inspirations for the design of the numerous sites in this imperial garden. The structures and scenes in the Beihai Park are described as masterpieces of gardening technique that reflects the style and the superb architectural skill and richness of traditional Chinese garden art.

The Bai Ta (White Dagoba) is a 40 m high stupa placed on the highest point on Qinghu Island. Its body is made of white stone. Sun, moon and flame engravings decorate the surface of the tower. Destroyed in 1679 by an earthquake, it was rebuilt the following year, and rebuilt again in in 1976, because of an earthquake which occurred at Tangshan City, near Beijing City. A Reliquary, secreted inside the structure are Buddhist Scriptures, monk's mantles and alms bowl, and the bones of monks (their remains after cremation).

There are several renowned Buddhist temples located within Beihai Park, such as the Yong'an Temple (Temple of Everlasting Peace) and the Chanfu Temple.

On the north bank lies the Five-Dragon Pavilions, five connected pavilions with spires and pointed upswept eaves, which was built in the Ming Dynasty.

The Nine-Dragon Wall lies north of the Five-Dragon Pavilion. It was built in 1756 and is one of three walls of its kind in China. It is made of glaze bricks of seven-colors. Nine complete dragons playing in the clouds decorate both sides of the wall.

Also on the north bank is the Jingxin Room (Quieting Heart Room). It is a garden within the garden, and covers an area of more than 4,000 m2.

The Circular Wall (Tuancheng) has as its main structure the Hall of Received Light (Chengguangdian), a spacious building with a double-eaved roof made of yellow glazed tiles bordered in green. Inside there is a 1.6 m tall Buddha presented to Emperor Guangxu by a Cambodian (Khmer) king. It is carved from a single piece of pure white jade inlaid with precious stones. The Eight-Nation Alliance damaged the statues left arm in the Battle of Peking in 1900.

In the Beihai Park, one could find Taihu rocks shipped from the Henan province and a variety of art collections ranging from jade jars from the Yuan-era to a collection of 495 steles bearing inscriptions by trees of hundreds of years old.