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The landscape of Hilo, on the Big Island of Hawaii, is diverse. Beaches of black, gray, brown and white sand give way to mountains and dramatic waterfalls. Hilo's Pana'ewa Rainforest Zoo is the only U.S. zoo in a tropical rainforest. A day trip away are snow-capped Mauna Kea and Mauna Loa, with observatories near 11,000 feet on both mountains, and Kilauea Caldera, an active volcano. Back in town are a farmer's market, restaurants, shopping and banyan trees planted by celebrities and politicians.