San Benito Mountain in central California has naturally occurring asbestos levels that are so high that no public access was allowed for years (historically, it

San Benito Mountain in central California has naturally occurring asbestos levels that are so high that no public access was allowed for years (historically, it was a popular off-roading area). More recently, public access is allowed, but you are only permitted to visit the site 5 times per year (the BLM keeps track).