Thailand is home to many beautiful islands, each with its own unique character and attractions. Here are some of the top Thailand islands that you should consider adding to your bucket list:

1. Phuket Island: Phuket is the largest island in Thailand, located in the Andaman Sea. The distance between Phuket and Bangkok is roughly 863 km (536 mi). A vibrant nightlife, secret temples, tropical beaches, and regional markets. People who relax in the sun and thrive at night are drawn to Phuket.
    
2. Koh Phi Phi - This island is known for its stunning beaches, crystal clear water, and vibrant nightlife. It's a popular destination for diving and snorkeling, and you can also visit the Phi Phi Leh lagoon and Maya Bay, made famous by the movie "The Beach".
    
3. Koh Lanta - If you're looking for a more laid-back island experience, Koh Lanta might be for you. It's known for its quiet, white sandy beaches, and there are plenty of opportunities for kayaking, snorkeling, and fishing.
    
4. Koh Samui - This island is known for its luxury resorts and spas, making it a popular destination for travelers looking for a bit of pampering. It also has some beautiful beaches, including Chaweng and Lamai, and a number of temples and waterfalls to visit.
    
5. Koh Phangan - If you're a fan of full moon parties, Koh Phangan is the place to be. The island is known for its monthly full moon parties, which draw thousands of visitors each month. It's also home to some beautiful beaches and a number of yoga retreats.
    
6. Koh Tao - This small island is a great destination for diving and snorkeling, with a number of dive sites and schools located on the island. It's also home to some beautiful beaches, including Sai Nuan Beach and Shark Island.
    
7. Koh Chang - This island is located in the Gulf of Thailand and is known for its beautiful beaches and waterfalls. It's a great destination for hiking, with a number of trails through the island's national park.