Everyone needs a visa, and you need a book a tour.
The visa costs $70, plus you must book a hotel, the cheapest is about $120 per night, and finally you have to deposit $300 per person to a bank in Spain. Oh and you have to fly in which costs $300 per person (from Beijing)
Israeli, South Korean and US citizens have to visit with special tours and make special arrangements.
Official Site
A travel agent who can organise tours and visas
