Answer:
Choroid plexus>
lateral ventricles>
foramina of munroe>
third ventricle>
aqueduct of sylvius>
4th ventricle>
formina of lushka and formen of magendie>
subarachnoid space of spinal cord>
Brain>
Arachnoid villi
Mneumonic:
C LFTs'? A Freaking Forimina (Lushka and Magendie) Say Back Away!
Weird, yes. Memorable? Most definitely.