9. Angkor Wat (Cambodia)
Built by the Khmer King Suryavarman II in the early 12th century in Khmer empire, Angkor Wat was first a Hindu, then subsequently a Buddhist, temple complex in Cambodia and the largest religious monument in the world. This empire went extinct after building amazing temples. Angkor Wat combines two basic plans of Khmer temple architecture: the temple mountain and the later galleried temple.
8. Colosseum (Italy)
Built of concrete and stone, Colosseum, is the largest amphitheatre of the Roman Empire, and is considered one of the greatest works of Roman architecture and engineering. It is used for gladiatorial combats, spectacles with wild beasts and the execution of early Christianity.
7. Stonehenge (UK)
Located in Salisbury, England, Stonehenge was built 3000 years ago from 3000 BC to 2000 BC. It is composed of a circular setting of large standing stones. While the stones were brought all the way from wales, no one knows how the builder got the stone walls. Stonehenge is added to the UNESCO's list of world heritage sites in 1986.