Sagnagrunnur is a mapped online database of Icelandic folk legends and fairy tales. ‘Ancient men’, Wizards, Elves, Sea-beings, Trolls and more, mapped and given citations on the dramatic terrain of Iceland. Possibly there’s also a secret wormhole to Gravity Falls in there somewhere.

The website also has a bibliography of the key scholarship on such topics, and a bunch of search and grouping tools sophisticated enough to require their own user manual.