side street, Travesía del Mercado nº3, you find the Fadrique de Basilea Book Museum "Museo del Libro Fadrique de Basilea", of the Burgos publisher, Siloé, a cosy museum that shows the history of the book from its first written form to its modern electronic form. Education State Education in Spain is free, and compulsory from 6 to 16 years. The current education system is called LOE (Ley Orgánica de Educación). Universities University of Burgos Often abbreviated 'UBU', the University of Burgos is a public university with about 10,000 students studying over 30 different undergraduate degrees, over 20 PhD Programmes, as well as several Official Masters and other graduate courses. It was established in 1994 when it was divided from the University of Valladolid. UBU cooperates with the Erasmus Project, a European Union (EU) student-exchange programme, and each semester hosts students from various countries across the 15-state European Union, as well as Iceland, Liechtenstein, Norway, Malta and associated countries in Eastern Europe. Additionally, university students from various regions around the world including China, Latin and North America are able to participate in exchange programmes to study abroad at the University of Burgos. In total, the University of Burgos has education agreements with over 100 international academic institutions. Isabella I of Castile University Isabella I of Castile University, established in 2008, is a private state-recognized university located in Burgos. It was fully accredited by the Spanish Government in 2011. Parks and recreation Most of the parks in the city of Burgos can be found along the river Arlanzón. Indeed, the banks of the river itself constitute a green corridor along the city. In total, there are nearly 3 square miles (1,878 acres) of parks in Burgos and one tree for every 3 inhabitants. El Parque del Castillo (or the Castle Park) is one of the lungs of the city. The city grew from the southern foot of the hill of the castle. Gradually, some of the upper neighborhoods began disappearing. After the destruction of the castle, military installations were established there. In the 1950s, the engineer Jaquotot Mariano, who later became mayor of the city, decided to leave the hill completely bare. Besides the ruins of the castle, this park contains the Bird Conservation Center, as well as play areas for children and spaces for exercise. Also, there is a terraced area with gardens and an ornamental fountain. The highlight of the