Valhalla proved, since its inception in 2015, to be a valuable part of the OSM software universe, occupying an important niche in the routing section. It's arguably one of the most feature-rich open-source routing engines, serving many different use cases and integrations/deployments. However it's a fairly complex system which is hard to comprehensibly document and new users or developers are often overwhelmed. So, I'd like to introduce its general architecture, capabilities and showcase "new" features (the last talk was given in 2016 on FOSS4G NA), as well as the accompanying open-source software, like various libraries, clients and docker image(s).