In the morning, visit the Grand Palace, the most famous landmark in Bangkok. Admire the stunning architecture and intricate details of the palace and temple inside. In the afternoon, take a short walk to Wat Pho, another beautiful temple where you can see the reclining Buddha. In the evening, head to Khao San Road for some shopping, street food, and nightlife.
Start your morning with a Thai cooking class, where you can learn how to make some of the most popular Thai dishes. After lunch, visit the Jim Thompson House, a beautiful traditional Thai-style house and museum. In the evening, take a river cruise along the Chao Phraya River and enjoy the scenic view of the city at night.
Spend your day pampering yourself at a luxurious spa, where you can enjoy a variety of massages and treatments. In the evening, head to Asiatique The Riverfront, a large open-air mall by the river, and enjoy some shopping, dining, and entertainment.
Saturday is the best day to visit Chatuchak Weekend Market, one of the largest outdoor markets in the world. You can find almost anything here, from clothing and accessories to souvenirs and antiques. In the evening, head to one of Bangkok's rooftop bars, such as Sky Bar at Lebua State Tower or Octave Rooftop Lounge & Bar.
Take a day trip to Ayutthaya, the ancient capital city of Thailand, and explore the ruins of temples and palaces. You can also take a boat tour along the river and enjoy the scenic view of the city. In the evening, head back to Bangkok and have a farewell dinner at one of the city's top restaurants, such as Gaggan or Nahm.
If you have extra time, consider visiting the following places: Wat Arun, Wat Saket, and Wat Traimit. You can also take a side trip to the Floating Market or the Tiger Temple. To maximize your fun, try some of the local street food, such as pad thai, tom yum goong, and mango sticky rice. Finally, don't forget to bargain when you are shopping at the markets.