Logan Airport (tel 617/561-1800 or 1-800/23-LOGAN), constantly busy with both international and domestic services, is a mere three miles from downtown Boston. It stands on an artificial peninsula jutting into Boston Harbor, created by leveling three islands and destroying Revolution Wharf. As driving within the city is not to be recommended, it makes little sense to rent a car at the airport. A taxi into town costs $10-20, plus an extra $4.50 in fees and tolls; the trip should take twenty minutes, but most traffic passes through the Sumner or Callahan tunnels, which can get very congested. The construction of the Ted Williams Tunnel has alleviated the problem somewhat. Between 5.30am and 1am, free shuttle buses run every few minutes from all terminals to the airport subway station on the MBTA Blue line, from where it's an easy ten-minute ride to the city center. Just as quick, and a lot more fun, is the water shuttle , which connects the terminal buses with Rowe's Wharf across the harbor, an easy gateway into the heart of north Boston (Mon-Fri every 15min 6am-8pm, Sat & Sun every 30min 10am-8pm; $10 one-way, $17 round-trip; tel 617/330-8680 or 1-800/23-LOGAN).