A portfolio of elevated bridges I have built. I'm big on infrastructure, and this includes boats as well as carts or foot travel. As such, I'm notorious for being an incessant stickler about bridges being tall enough to allow for the passage of boats. It's not only more functional than the causeways new players plague servers with in SMP, they look much nicer.

I don't think there is ever a good excuse not to build a bridge over a body of water; causeways that are built into the water and flush with the surface are, to me, the horizontal equivalent of nerd poles. Lazy, ugly, and impediments to navigation.