In OSX ion, Apple voted to make simpler for normal users and hide the Library folders. But that’s OK, you can make is visible again.
Applications > Utilities > Terminal, Launch Pad > Terminal, Spotlight > Terminal — open Terminal and then copy or paste in the following command:
chflags nohidden ~/Library/
Alternately, if you want to hide the Library in your home directory, type or paste this command:
chflags hidden ~/Library
Whether making the Library visible or hiding it, takes effect immediately — there’s no need to log out or restart.
and then you get: