Ka-ching. Ka-ching. Ka-ching. Every time you cross this classic causeway you can virtually hear the sound of money dancing back into your pocket. As long as the slow-motion construction continues on a new toll booth (modeled on the original), there will be no charge to use the Venetian Causeway. One of the most beautiful thoroughfares in South Florida, it offers great views of the downtown skyline, Biscayne Bay, waterfront homes dotting the Venetian islands, and the hordes of bikers, bladers, and joggers who constantly are zipping about. Be sure to cram in as many trips as you can before July -- that's when the new toll booth is scheduled to open.