Keyhole-shaped tumuli are scattered throughout the city of Sakai in Japan's Osaka Prefecture. A tumulus is a mound of earth or stone raised over a grave, and the largest one shown in this Overview is the final resting place of Emperor Nintoku. Nearly 1,600 feet (486 m) long with a mound 115 feet (35 m) high, it covers the largest area of any tomb in the world.
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Vantor
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