Phuket
Many travelers who come to Thailand choose to base themselves in Phuket, which is the largest island in the nation, so they can get the most out of their trip. Your opinion will be eagerly supported by visitors to travel websites who have read nothing but beautiful reports of the breathtaking landscape.
On the other hand, the parts of the island with the most population are also the parts with the worst water quality and the most rubbish. In addition, the beaches are normally highly busy the vast majority of the time due of the large number of tourists who visit the region throughout the course of the year.