A beacon is an indicator used in Second Life's UI and can look differently:
- map: A red circle or in-world an infinitely tall red transparent cylinder that is used to track friends or locations. Tracking can be started and stopped through the world map or stopped from the right-click context menu on the mini-map.
- View Menu -> Beacons options: ~100m tall, thin, different-colored lines with 4m crossbars (intersecting horizontal lines forming an axis) and a wireframe cube in the center that show different things: