The la central library has these silent study floors that most tourists never discover. Take the elevator to floors 4-5 for complete quiet - it's such a relief from the downtown chaos.

Floor 5 has this beautiful rare books room that's especially peaceful. The architecture is gorgeous, chairs are actually comfortable, and wifi is free. Open until 8pm on weekdays.

Perfect when you need to recharge between attractions but don't want to go back to your hotel. I've spent hours here just people-watching through the windows.