Parc de la Ciutadella is one of Barcelona's major green spaces today, providing a unique refuge to escape the city's bustle. The park was built at the end of the 19th century on territory that had previously been occupied by a military fortification built by order of Philip V. More than 100 plant species, including lime trees, poplars, Canary Island palm trees, and even centenary trees, may be found in the Ciutadella today. Many people believe the park to be an open-air museum because of the numerous statues. This place is a must-visit on your next trip to Barcelona.