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Welcome to the Instagram blog! See how Instagrammers are capturing and sharing the world's moments through photo and video features, user spotlights, tips and news from Instagram HQ.

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Location Feature, ruby falls, waterfall, tennessee,

Inside Ruby Falls, Tennessee’s Underground Waterfall

For more photos and videos from the falls, explore the Ruby Falls location page.

341 meters (1,120 feet) beneath Lookout Mountain in Chattanooga, Tennessee, an underground stream winds its way through the caverns before plummeting to depths below. This site, known as Ruby Falls, has become one of the most famous tourist spots in the southeast United States, drawing visitors to capture the sight of the falls.

The caves of Lookout Mountain have a rich and storied history leading up through the 19th century, but in 1905 railway construction along the mountain shut off all access to the caverns, leaving it inaccessible to visitors. Inspired by the stories of the past, cave enthusiast Leo Lambert garnered resources to reopen the site by constructing an elevator shaft down into the cavern, and in 1928 construction on his project commenced. In excavating the shaft, however, Lambert discovered a new section of the cavern and—at its end—the waterfall.

Lambert named the falls after his wife, Ruby, and went on to develop the site into a destination for visitors with regular tours and Cavern Castle, an elaborate above-ground reception center. In time, Ruby Falls also came to be one of the first caves outfitted with electric lights. Now, colored lights illuminate the falls, making it an even more attractive destination for visiting Instagrammers.

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Location Feature, iguazu, foz do iguaçu, waterfall,

Instagrammers Brave the Mists of South America’s Iguazu Falls

For more photos from the falls, check out the location pages for Garganta del Diablo in Argentina and Garganta do Diabo in Brazil.

The Iguazu River marks the border between the South American countries of Argentina and Brazil. As it snakes eastward towards Paraguay, the river encounters the Paraná Plateau where the it suddenly surges over an 82-meter drop. A series of islands along the 2.7-kilometer ridge divides the river into the hundreds of cataracts that make up Iguazu Falls, one of the widest waterfalls in the world.

The giant U-shaped gorge known as “The Devil’s Throat” marks the focal point of Iguazu. A kilometer-long walkway on the Argentine side leads visitors to a dizzying view from the gorge’s top, while the Brazilian side boasts a platform at the falls’ base that affords tourists a panoramic view of the surrounding 260 degrees of falls.

The protected environment on both sides of the border is home to many jungle species including Iguazu’s particularly photogenic coatis. Intrepid Instagrammers braved the mists and weren’t afraid to get their phones a bit damp for these incredible photos from the falls.