Our best souvenirs when vacationing have been the ones we've collected through geocaching. Geocaching is high-tech treasure hunt using GPS devices and satellites. Currently there are nearly 1 million locations throughout the world to visit.

The objective is to find hidden containers, or geocaches, in outdoor locations and then collect a treasure from those containers. Frequently, we get to explore part of a city we'd never ordinarily think to visit.

The treasure found in these caches may only be dollar trinkets, but the true souvenir is the adventure of trekking through the outdoors with my family.