ne way to reach Ko Kret is to take the once-weekly Chao Phraya Express, which leaves the Central Pier (BTS Saphan Taksin) every Sunday at 09:00 and visits a number of attractions before returning at 15:30. The cost of the cruise and guided tour is 300 baht (no lunch). Many other companies also offer similar tours, often just as a stop on a longer upriver trip to Ayutthaya.