Postcards have been around at least as long as any organized postal service. The first documented sending of a postcard was in 1840. They're still holding on and holding a place in my heart. There's no better way for a traveling word nerd to send greetings than with a postcard.
I love these location independent postcards from the Etsy shop A Pair of Pears. The cards come in a set of six and feature original photographs by the shop owners. Long live snail mail!