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The Wave sandstone formation in Paria Canyon, ArizonaKnown simply as The Wave, this sandstone formation rises from the desert near Page in northern Arizona, close to the Utah border. Its curling red, coral and…
Inside the Blue Grotto Sea Cave of CapriThe Blue Grotto Sea Cave of Capri draws visitors into a narrow opening on the west coast of Italy’s island of Capri. From a small rowing boat, the entrance…
The Kelpie horse head sculptures of Falkirk, ScotlandFalkirk’s giant horse head sculptures, the Kelpies, loom beside the M9 like industrial guardians, their open mouths and wind-tossed manes transforming a…
The Door to Hell Gas Crater in Derweze, TurkmenistanIn the middle of Turkmenistan’s Karakum Desert, a vast orange glow rises from a collapsed natural-gas field. Known internationally as the Door to Hell, the…
The Giant’s Causeway: Northern Ireland’s Basalt CoastAlong County Antrim’s rugged north coast, dark stone columns rise from the Atlantic like the remains of an ancient road. The Giant’s Causeway is one of…
Walking the Riverbed of Rio Secreto in MexicoRio Secreto is not a conventional riverside stroll. On Mexico’s Yucatán Peninsula, this underground river threads through limestone caves beneath the jungle of…
Glowworms and underground water at WaitomoFew underground landscapes feel as far removed from ordinary daylight as Waitomo, where darkness, water and thousands of tiny glowworms turn a limestone cave…
The Meteorite Crater in Arizona, up closeAt first glance, the Meteorite Crater looks like a dark, tidy scoop pressed into the high desert near Winslow, Arizona. Its official name is Meteor Crater,…
The island of Brazil's venomous snakesKnown as the Island of the Venomous Snakes in Brazil, Ilha de Queimada Grande is a densely forested outpost about 140 kilometres off the coast of Peruíba, in…
The glacial blue ice cave in VatnajökullBeneath Iceland’s immense ice cap, meltwater has opened a passage through ancient, compressed ice. Sunlight passing through the translucent walls gives the…