Tup Island, also known as Ko Thap, is a popular spot for day trips and tours in Krabi. It's a small island with a nice beach and great snorkeling opportunities. The highlight is the sandbar that emerges at low tide, connecting it to Chicken Island and Koh Mor. This unique phenomenon, called Talay Waek, offers stunning views and a fun experience of walking across the shallow waters. Tup Island is part of the Four Island Tour, where visitors can explore other beautiful islands in the area. Just watch out for sharp corals and shells when walking on the sandbar!