"In the situationist thought, a Dérive is a concept meaning an aimless walk, probably through city streets, that follows the whim of the moment. It is usually translated as a drift."
"Dérive ... was defined by the situationists as the 'technique of locomotion without a goal', in which 'one or more persons during a certain period drop their usual motives for movement and action, their relations, their work and leisure activities, and let themselves be drawn by the attractions of the terrain and the encounters they find there'."
From Theory of the Dérive:
"In a dérive one or more persons during a certain period drop their relations, their work and leisure activities, and all their other usual motives for movement and action, and let themselves be drawn by the attractions of the terrain and the encounters they find there."
Geocaching is an outdoor treasure-hunting game in which the participants use a Global Positioning System (GPS) receiver or other navigational techniques to hide and seek containers (called "geocaches" or "caches") anywhere in the world.
 Cave Clan
Geohashing is an arbitrary way of exploring places we wouldn't otherwise see. Cave Clan are also dedicated to looking at our urban surroundings in a different fashion, albiet a subterranean fashion.
But what was beneath the grate!? Talk:2008-05-25_-33_151
we venture into places other people would not usually think of going, just to see what's there. - about Cave Clan
See also, Underground Achievement.
 Flash Mob
A flash mob (or flashmob) is a large group of people who assemble suddenly in a public place, perform an unusual and pointless act for a brief time, then quickly disperse. The term flash mob is generally applied only to gatherings organized via telecommunications, social media, or viral emails.
 Same Name, Different Concept
- Geohashing: A GPS-based drinking game.
- The Geohash: A means of encoding locations with arbitrary precision.
- Geohashing: GPS-using professionals trying to figure out how to combine trail running (hashing) with GPS.