Borobudur is one of the world heritage.
here some info about borobudur :
In 1956 UNESCO began an assessment process for the full scale restoration of the monument. Finally in 1968, a major plan to restore Borobudur was created, and this huge project involved a complete overhaul of the monument up until 1983. The unsteady foundations were stabilized, everything was meticulously cleaned and a major drainage system installed. After the works were finished, UNESCO formally listed Borobudur as a World Heritage Site in 1991. Since then, the profile of Borobudur has increased enormously, and it is now a major international tourist attraction. Its statues, reliefs and stupas have spawned millions of replicas which adorn properties worldwide.