"Imagine...Water cascading off cliffs the height of Mount Everest and thundering through continuous rainbows, straight into an ocean the color of sapphire wine."
– Gideon Seyetik, 2370 ("Second Sight")
Da Vinci Falls were a spectacular set of waterfalls, located on the planet Blue Horizon.
Named after Leonardo da Vinci, they were terraformed by Gideon Seyetik, and considered his "crowning glory." (DS9: "Second Sight")