Santiago has 3 bus terminals. I recommend giving a bus driver / taxi driver a piece of paper saying ' BUS- Mariato - TORIO' and they will set you on your way. The taxi ride should be no more than $3.00 to the correct terminal. Once there, show your piece of paper again, and get on the bus. You might have to wait a few minutes, and the last bus leaves at 4pm. If you miss it, there is a hotel / rooms for rent by the grocery store. Bus - $ 5.00 1.5 hours