Level 2 near domestic departures has these hidden seating areas that most people walk right past. Way quieter than the main international departure level and you don't need a boarding pass to access them.

There's also a little garden area on level 4 that nobody talks about. It's technically for smokers but you can sit outside the smoking section and it's surprisingly peaceful. Free wifi works perfectly there too. If you're doing a long layover, these spots are lifesavers.