Elven Forests

Everything is built to a more primal, ancient scale. The trees are impossibly huge, such that their branches don't even interrupt sightlines, instead arching overhead like a cathedral's vaulted ceiling. Their roots mound up from the carpet of pine needles like hills, with narrow wooden bridges built between them five or ten feet up. The river runs through the center of the forest a mile across and almost as deep at its center.

The animals are similarly gigantic: dire elk, winter wolves, elementals, treants, and fish the size of horses.

This may be the reason elves are sometimes depicted as tiny, living in a treehouse: if one were to neglect to scale up the trees, they would appear to be only a handspan tall.