Today I hopped on a minibus with three friends and rode about 30 minutes to Moon Valley. Minibuses are part of the transportation system here and are essentially vans that list maybe 3 streets on the windshield. They slow while passing you on the street so you can read the names and sometimes the side door open and someone on board yells out the streets it will be going to. Our roundtrip journey cost $4.60 USD total (not each). And entry to Moon Valley cost an additional $2.30 USD each. Overall, certainly should be on the to-do list anyone who visits La Paz. The site was beautiful and the pictures don't do it justice but try to see for yourself :)
Check out some pictures below.