Is the Mark Twain Riverboat the most under-rated ride at Disneyland? Board an old-fashioned steam-powered vessel for a half-mile journey into the heart of the American frontier. During the charming, 14-minute trip around Pirate’s Lair on Tom Sawyer Island, hear lively narration about a time gone by. The Mark Twain is an authentic reproduction of the historic vessels that ferried people up and down the mighty Mississippi River. A working steam engine converts the water from the Rivers of America