Land in California for $1,000 per acre.

Hello everyone. I came to San Diego as a student and will return to my home country in 6 months. I want to buy a very cheap piece of land from here before I return to my country. It could even be a desert. My motivation in this regard is the possibility of its value maybe 50 years later. It might be a surprise to my grandchildren.

Are there any websites where I can review such very cheap parcels? Or can you recommend another alternative way? Thanks.