The Devil's Pool 魔鬼池
More than twice the height ofNiagara Falls（尼亚加拉大瀑布）, Victoria Falls in southeastern Africa measures in at 355 feet tall and more than 5,500 feet wide. But for some brave souls, the top of the Falls is just another swimming hole. With water levels at their lowest from September to December, swimmers venture into the Devil's Pool, an area with minimal current, mere feet from where the water gushes hundreds of feet down into the gorge below.
Oil gushed (out) from the hole in the tanker.
Barton Springs Pool 巴顿泉池
Fed from freshwater underground springs that were once used forpurification（净化；提纯；涤罪）rituals by the Tonkawa Native American tribe, the Barton Springs Pool in Austin, Texas, covers threeacres（英亩）and maintains a temperature of about 68 degrees year-round. Admission to the 18-feet-deep pool ranges from mid-March until the end of September. For residents, the cost is $3 for adults and $1 for kids (non-residents pay $8 for adults and $3 for kids).
Bondi Iceberg public pool 邦迪冰山公共泳池
A 15-minute drive from Sydney, Australia, where the country's southeastern coast meets the Tasman Sea, sits The Bondi Baths at Bondi Icebergs. The historic 50-meter public saltwater pool has been around for more than century and features a small beach, bar, andkiddie（小孩）pool—not to mention（更不必说）the occasional wave crashing harmlessly into the pool. The entry fee ($7 for adults; $5 for kids) isn't much considering the million-dollar view.
Hot Springs National Park 温泉国家公园
Located in Hot Springs, Arkansas, and designated by President Andrew Jackson as a special reservation in 1832, Hot Springs National Park, and the 47,143-degree springs within the 5,500-acre nature reserve, have been asanctuary（避难所；至圣所）for those seeking healing andsolace（安慰；抚慰）for more than a century.
Johnson's Shut-Ins 约翰逊大峡谷
The East Fork Black River in southeastern Missouri cascades over and around billion-year-old lava rock to form dozens of smallrivulets（小溪）andwading pools（浅水池）in the 8,550 acre Johnson's Shut-Ins State Park.
Dudu Blue Lagoon 嘟嘟蓝色泄湖
Does floating in a secluded 100-feet-deep freshwater pool so pristine that it glimmers with a shade ofcobalt（由钴制的深蓝色）blue sound like paradise to you? Then check out the Dudu Blue Lagoons, located near the town of Cabrera on the northeastern coast of the Dominican Republic. The lagoon also features underwater caves, making it a popularscuba（水中呼吸器）diving destination.
Cenote Ik Kil 塞诺特天坑
Tons of natural swimming holes, known as cenotes, cover the Yucatán Peninsula in Mexico, but Ik Kil is deemed to be the most beautiful cenote, by far. Not only is the deep blue pool surrounded by hanging vines andserene（平静的；安详的；清澈的）rainforests, it's also a mere walking distance from the Mayan ruins of Chichen Itza.
Havasu Falls 哈瓦苏瀑布
These breathtaking waterfalls and blue-green waters can be found on the Havasupai Indian Reservation within Havasu Canyon in Arizona. Each year, the spectacular Havasu Falls attracts thousands of visitors.
Sua Ocean Trench 苏阿海沟
Volcanic eruptions（火山爆发） on the Upolu island in Samoa created this stunningaquamarine（海蓝宝石） grotto（岩穴，洞穴）. Sua Ocean Trench literally translates into "big hole"—the perfect name for a 98-foot deep pool. Visitors can descend into the tranquil waters by climbing down a long wooden ladder.
Queen's Bath 皇后温泉
Queen's Bath is a favorite summertime attraction in Kauai, Hawaii. Fresh saltwater from the Pacific Ocean spills over thelava（火山岩浆）rocks to create a beautiful natural tide pool complete with its very own fish.