The river of wine

This huge land area would be designed to create a literal river of wine. Wild grape vines would be grown on steep embankments among rodents who would eat some of the grapes. Larger animals would be there to chase the rodents, knocking ripe grapes down into a channel. As long as some percentage, even a few percent, end up rolling down this works. Just make the vine area as large as necessary.

The channel would be shaped to drop the grapes over a sort of grape waterfall covered with sharp, long-lasting stone outcroppings such that at the bottom there would be a waterfall of grape juice. Hopefully some animal can be found to eat the grape pulp before it rots.

This grape juice would flow into a long, slow-flowing underground lake containing the appropriate life forms for fermentation and hopefully for removal of other impurities. Thence it would flow through moss filters into the river. I give you the wine river from Lucian's A True Story!