I also love the imagery of the arch for beach weddings (mine...one day). I think that even couples who aren't Jewish can incorporate a huppah because of it's significance. So I searched online and found some pretty unique huppahs/arches to show you.
"What to Expect From a Jewish Wedding" is awesome as it goes over every aspect of a Jewish wedding and features a really beautiful flowery huppah.
Photo courtesy of Cameron Ingalls
Amazing lighting can really showcase your huppah!
A contemporary, sleek, white huppah.