Created in 1997 by Marek Snowarski, the project combines a comprehensive mushroom atlas with tools for learning about species and following seasonal activity. Its taxon entries include descriptions, identification keys and photographs, while supporting material covers mushroom gathering, preparation and the species people may encounter throughout the year.

The site also provides a map of mushroom reports, including regional observations and records from thousands of localities, as well as seasonal monitoring and an option to browse recent reports. Visitors can explore indexes, species lists, a glossary, bibliography and educational resources, or consult its naturalist atlas. Additional features include a smartphone app, information about protected and threatened fungi, project details, photo credits and media resources. The site reports extensive collections of taxon pages, photographs and foraging observations. Its content is available in a general browsing version, with access to additional information requiring sign-in.