1) The Great Wall of China is a UNESCO World Heritage site and one of the most iconic man-made structures in the world. It stretches over 21,196 kilometers (13,171 miles) and was constructed to protect the Chinese empire from invasions during ancient times.

2) Honey never spoils. Archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly edible.

3) The world's largest volcano, Mauna Loa in Hawaii, is also one of the most active.

4) Insurance fraud occurs when individuals or organizations deliberately deceive insurance companies to receive undeserved benefits.