If you’re looking for a spectacular swimming hole this summer, you might do well to check out To Sua Ocean Trench in Samoa. Preternaturally clear and 100 feet deep, this photogenic sea trench has been dazzling visitors in this lonely corner of Samoa’s most populous island for generations. To Sua enthusiasts used to swim in through the dangerous sea cave that gives the pool its water, but nowadays, a safe and sensible ladder and platform provides easier access. There’s also a dry inland sister trench named To Le Sua just a few yards away. Legend says all the spirits that lived in To Sua up and moved to To Le Sua when the ocean came. Administered by the small nearby village of Lotofaga, To Sua is open seven days a week from 7 a.m. to 6 p.m. Entry is $15 for adults, $6 for kids ages 7 to 15, and free for those under 7. Dive into this must-see sea trench below. The name “To Sua” translates to “Big Hole.” Image by Noritoshi Takeuchi.