In the morning, visit the Grand Palace and Wat Phra Kaew, the most important Buddhist temple in Thailand. In the afternoon, explore the vibrant Chinatown and enjoy a Thai massage. For the evening, head to Khao San Road for some street food and partying.
After a morning flight to Phuket, head to Patong Beach to sunbathe and swim. In the afternoon, take a boat tour of Phang Nga Bay and visit James Bond Island. For the evening, party at the famous Bangla Road and check out the cabaret shows.
Start the day with a snorkeling trip in Phi Phi Islands and visit Maya Bay, where The Beach was filmed. In the afternoon, take a boat tour to Viking Cave and Monkey Beach. For the evening, enjoy a beach party and fire show at Slinky Beach Bar.
Spend the morning at Chaweng Beach, the most popular beach on Koh Samui. In the afternoon, visit the Big Buddha Temple and the Hin Ta and Hin Yai Rocks. For the evening, party at Ark Bar Beach Club, one of the biggest beach clubs on the island.
In the morning, visit Wat Phra That Doi Suthep, a beautiful temple located on top of a hill overlooking Chiang Mai. In the afternoon, learn how to cook Thai food at a cooking class. For the evening, visit the Night Bazaar and enjoy some live music at the North Gate Jazz Co-Op.
Consider visiting the Full Moon Party on Koh Phangan, taking a day trip to the Elephant Nature Park in Chiang Mai, and trying some local street food like pad Thai and mango sticky rice. To maximize your fun, book accommodations near the nightlife areas and schedule some downtime for rest and recovery.