During the first semester of the 2017/18 university year I took part in organisation of a Cipherhunt (together with a great deal of work by »Simon« and »Lukas«). This involved a variety of classical as well as unusual ciphers/teasers being hidden around the campus. Upon solving one of them, one would obtain instructions on where to collect the next one.

The Cipherhunt is/was online at www.cipherhunt.info, but for anyone interested I include the whole content below!