Yellow Arrow is a spatial annotation project that started in Brooklyn (NY) in which anyone can mark places of interest with sticker and tell a story about it.

People print out and place yellow arrows in a public place of their choice. They make a digital photo and post the images with a personal description on the site; these are linked from a map on the website.

When other people come across a yellow arrow in a public place, they can call from their mobile phone and access the information from the site.

Via Glowlab.
Thxx Stef.