Thailand

Here's an ideal itinerary for 4 days in Thailand that meets your constraints:

Day 1: Bangkok

• Start your day with a visit to the Grand Palace, a stunning complex of buildings that was once the home of the Thai royal family.
• Next, head to Wat Pho, a temple complex that is home to the famous reclining Buddha statue.
• For lunch, head to the nearby street food market at Yaowarat Road, where you can sample some of the best Thai street food.
• In the afternoon, take a boat ride along the Chao Phraya River to see the city from a different perspective.
• End your day with a visit to the famous Khao San Road, a bustling street filled with shops, bars, and restaurants.

Day 2: Chiang Mai

• Take a morning flight to Chiang Mai, a city in northern Thailand known for its beautiful temples and outdoor activities.
• Start your day with a visit to Wat Phra That Doi Suthep, a stunning temple located on a hill overlooking the city.
• For lunch, head to the Warorot Market, a bustling market filled with food stalls and local handicrafts.
• In the afternoon, take a hike in the nearby Doi Inthanon National Park, where you can see waterfalls, forests, and stunning views of the surrounding mountains.
• End your day with a visit to the Chiang Mai Night Bazaar, a lively market filled with food, souvenirs, and local crafts.

Day 3: Krabi

• Take a morning flight to Krabi, a province in southern Thailand known for its beautiful beaches and limestone cliffs.
• Start your day with a visit to Railay Beach, a stunning beach that is only accessible by boat.
• For lunch, head to one of the many beachside restaurants in the area, where you can enjoy fresh seafood and Thai cuisine.
• In the afternoon, take a kayak tour of the nearby mangrove forests, where you can see a variety of wildlife.
• End your day with a visit to the Tiger Cave Temple, a temple located on a hill that offers stunning views of the surrounding area.

Day 4: Phuket

• Take a morning flight to Phuket, an island in southern Thailand known for its beautiful beaches and nightlife.
• Start your day with a visit to the Big Buddha, a giant statue located on a hill overlooking the island.
• For lunch, head to one of the many beachside restaurants in the area, where you can enjoy fresh seafood and Thai cuisine.
• In the afternoon, take a boat tour of the nearby islands, where you can see stunning beaches and crystal-clear waters.
• End your day with a visit to Bangla Road, a lively street filled with bars, clubs, and restaurants.