Bangkok-Chiang Mai by Train

Eastern Orient Express
Travel like in yesteryear on the Eastern Orient Express through the enchanting scenic countryside of Thailand.
Bangkok - Chiang Mai
2 days/1 night journey (presidential suite)

Chiang Mai

Four Seasons
The Four Seasons offers a perfect starting point to explore the beauty of northern Thailand. The Resort also houses one of the world’s best and most beautiful spas. (3-5 days)
http://www.iexplore.com/res/d.jhtml?type=Travel+and+Trips&destination=Thailand

Golden Triangle Tented Camp (opened January 2006)
A one-of-a-kind experience in luxurious tented accommodations awaits you.
Go to their website

From Chiang Mai, fly to Phuket, Ko Samui or Ka Lanta.

Ko Samui

Evason Hideaway
The beauty and spirit of this place ensures perfect relaxation.
Go to their website

Phuket

Aman Resort
Discover simple luxury in Amanpuri.
To experience the beauty of the sea, spend 1 or 2 days on a traditional boat – sleep under the stars, go snorkeling and relax your spirit.
Go to their website

Trisara
A small but extremely luxurious hotel.
Go to their website