In the morning, explore the Grand Palace and Wat Phra Kaew. In the afternoon, visit the famous Wat Pho and get a traditional Thai massage. In the evening, party at Khao San Road, one of Bangkok's liveliest streets famous for its bars and nightclubs.
Start the day with a visit to the Pattaya Floating Market and experience local food and shopping on boats. In the afternoon, head to Nong Nooch Tropical Botanical Garden for some outdoor activities and cultural shows. In the evening, hit the Walking Street for a pub crawl and enjoy the city's vibrant nightlife.
Begin the day with an island-hopping tour to Phi Phi Islands, Maya Bay and the Viking Cave. In the afternoon, visit the Big Buddha and enjoy the panoramic views of the city. In the evening, party at Patong Beach and Bangla Road, two of Phuket's most famous nightlife spots.
Start the day with an early morning hike to Doi Suthep, one of the most famous temples in Chiang Mai. In the afternoon, visit the Elephant Nature Park for an ethical elephant encounter. In the evening, enjoy a night out at the Night Bazaar and sample some local street food while shopping for souvenirs.
You may also want to consider a side trip to the Ayutthaya Historical Park, a UNESCO World Heritage Site, from Bangkok. For maximizing fun, try out some Thai cuisine cooking classes, Muay Thai boxing classes, or go bar hopping in some of the hidden alleys of Bangkok. Lastly, make sure to bring sunscreen, insect repellent, and dress appropriately for the temples and cultural sites.