Walking into a bookshop in Lima and finding an English language edition of the latest National Geographic - something I keep seeing in shops all over the world and something I'm always disappointed to discover/remember isn't in English.
Delight is finding 2 back issues you'd forgotten you brought to Peru, stored in a box of stuff in Lima.
Three whole National Geographics to read, a copy of Geographical (another discovery) and my last remaining paper book (until I can swap some) - Rendezvous With Rama. A good haul.