Strokkur geyser, Iceland
Strokkur, in the Haukadalur valley, is Iceland's most visited geyser because it's so reliable, with eruptions happening about every 10 minutes or so, making it ideal for tourists looking to experience Iceland's famous natural beauty.
Strokkur usually erupts to about 15 or 20 metres, but has been known to get as high as 40 metres.
The Great Blue Hole, Belize
Soar above the coast of Belize and you’ll glimpse the wonders of the deep, or don your scuba gear and make a beeline for Lighthouse Reef, where the Great Blue Hole lures divers into its yawning 1,000-foot-round cavern.
Kimberly’s Big Hole, South Africa
After the discovery of an 83-carat diamond in 1871, people rushed to South Africa to dig frantically – and deep – for more buried treasure. Today, the world’s largest man-made hole stands as a reminder of the diamond-rush days and as you peer into the 1,097-metre abyss, ponder where those three tons of diamonds may have ended up…
Grand Prismatic Spring, Yellowstone, USA
Yellowstone's Grand Prismatic Spring is the largest hot spring in the USA, and one of the largest in the world. First noticed by geologists in 1871, the 90m wide spring is now a popular tourist attraction.
The spring gets its magnificent colour from microbial mats around the edges of the water, and the colour changes depending on the temperature. In summer they're orange and red, while in winter they're dark green.
Caves of Nerja, Spain
This extensive cave in the Province of Malaga, Spain, is one of Spain's key tourist attractions, and has been attracting people into its depths for thousands of years. In fact, cave paintings dating back 42,000 years have been discovered inside - some of the oldest cave paintings in the world. These days visitors can enjoy concerts inside the chambers which form a natural amphitheatre. Much of the Nerja Caves remain closed to the public, however, with the high galleries and new galleries area only discovered in the late 60s.
Kiama Blowhole, Australia
At Kiama Blowhole in Australia spectators may want to stand a respectful distance from this, one of the most powerful sea-cave blowholes in the world. With water spurting up to a staggering 82 feet, not only will you get soaked, you may get swept away in the Pacific surf.
Ik-Kil, Mexico
Travellers to the Yucatan Peninsula, Mexico, are just as drawn to the ancient Mayan site of Chichén Itzá as they are to Ik-Kil, another Mayan site where royalty once bathed in the dazzling blue water. Known as ‘cenotes’, there are thought to be thousands of these natural wells scattered along the Mexican coast.
Charco de los Clicos, Lanzarote
The small fishing village of El Golfo in Lanzarote is famous for its unusual beachside attraction. Charco de los Clicos, also known as Charco Verde or the 'green lagooon', was formed by a volcanic crater that's connected to the sea underground. The unusual green colour of the lake comes from algae, minerals and sulfurs. It's no wonder this prehistoric looking sight was chosen as a filming location for the 1966 film One Million Years BC, starring Raquel Welch. The green lagoon and surrounding lunar landscapes of Timanfaya National Park are worth a tripduring a Canary Islands holiday, although swimming is stricty prohibited in the Charo de los Clicos.
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