1) The Serengeti National Park, located in Tanzania and extending into Kenya, is renowned for its vast savannahs, diverse wildlife, and the annual wildebeest migration. It is a UNESCO World Heritage site and a popular destination for safari enthusiasts and nature lovers.

2) The Age of Exploration, during the 15th and 16th centuries, saw European explorers such as Christopher Columbus and Vasco da Gama reach new lands and establish trade routes.

3) The Great Barrier Reef in Australia is the largest coral reef system in the world and is visible from space.

4) Cricket, originating in England, is a popular sport played in many countries and is known for its distinctive rules and terminology.