Miami Everglades is not far from the ocean. There are also places in the keys where you can fish. Key West, it's a long drive. Could be looking at 3-4 hours from here. Depends on traffic and there are lots of places where it's one lane. If someone decides they want to drive slow you're stuck. An accident can shut down everything. Not saying you shouldn't make the trip, just be aware it's an all day, long day adventure. You can also take a drive into the upper keys and check them. Good snorkeling in Key Largo. The reefs are located in a national marine preserve.