Definitely Thailand. I’ve been to both Thailand and Ecuador and although Ecuador is beautiful, the beaches are not much to write home about, whereas Thailand’s beaches are fantastic. The water in Thailand is much warmer. Plus, the tourist infrastructure in Thailand is much better. I do love both countries, but if you want to go somewhere that’s renowned for its beaches, go to Thailand. The only place in Thailand I’ve been that didn’t have great swimming, was the island of Koh Chang. There were a lot of rocks in the water, making it difficult to swim, but that was the only place. All the other islands we went to were fantastic, I especially loved Raillay Beach in Krabi. It has been my favorite place in Thailand by far. I think Ecuador excels in its inland beauty like the Cotopaxi volcano, rainforest and hot springs.