This week's featured UNESCO World Heritage Site is tucked away in the southeastern corner of Venezuela, near the borders with Brazil and Guyana. Canaima National Park is vast expanse of rugged wilderness so remote and unusual that it inspired the setting of Sir Arthur Conan Doyle's novel The Lost World. Here's how UNESCO describes the park: Canaima National Park is spread over 3 million ha in south-eastern Venezuela along the border between Guyana and Brazil. Roughly 65% of the park is covered by table mountain (tepui) formations. The tepuis constitute a unique biogeological entity and are of great geological interest. The sheer cliffs and waterfalls, including the world's highest (1,000 m), form a spectacular landscape. The unusual and unique tepuis really make Canaima National Par

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