Parc de la Ciutadella is a large public park in Barcelona, Spain. It is located in the city center, just east of the Gothic Quarter and adjacent to the trendy El Born neighborhood. The park covers an area of 70 acres and features a variety of attractions, including museums, a lake, a zoo, and several gardens.

The park was designed by Josep Fontseré and built for the 1888 Universal Exhibition. It was designed to showcase the best of Catalan culture and industry, and it quickly became one of the most popular attractions of the exhibition. The park was named after the Ciutadella, a military fortress that once stood on the site.

One of the most popular attractions in the park is the Barcelona Zoo, which houses more than 4,000 animals from around the world. Other notable attractions include the Catalan Parliament building, the Castle of the Three Dragons (a museum of natural sciences), the Museum of Zoology, and the Museum of Geology. The park also has several ornamental fountains, including the Cascada, a large fountain designed by Josep Fontseré and Antoni Gaudí.

In addition to its many attractions, the Parc de la Ciutadella is also a popular spot for locals and tourists to relax and enjoy the outdoors. It has several gardens, including the Roserar (Rose Garden), which has over 10,000 roses, and the Umbracle, a shady garden with palm trees and other exotic plants. The park also has a large lake, which can be explored by renting rowboats or pedal boats.