St. James's Park is a 23-hectare (57-acre) park located in the City of Westminster, London. It is one of the eight Royal Parks in London and is situated just east of Buckingham Palace. The park was originally a marshland used for grazing horses and has undergone several transformations over the years.

St. James's Park features a lake, a small island, several bridges, a fountain, and various statues and monuments. The lake is home to a wide range of waterfowl, including pelicans, which have been resident in the park since the 17th century.

The park also features a number of walking paths and gardens, including the Rose Garden, which features more than 10,000 roses, and the Wildlife Garden, which is home to a variety of birds, insects, and other wildlife.

St. James's Park is a popular destination for tourists and locals alike, offering stunning views of Buckingham Palace and Westminster Abbey. The park also hosts a number of events throughout the year, including the annual Trooping the Colour ceremony, which celebrates the Queen's official birthday.