Photo shows the Mutianyu section of the Great Wall in Beijing. While today's Great Wall mostly date back to the Ming and Qing Dynasties, parts of the structure go back as early as 500 BCE. (Photo/China News Service)
File photo shows the Sensoji Temple in Tokyo, Japan. Sensoji is an ancient Buddhist temple, and is Tokyo's oldest remaining religious temple. (Photo/VCG)
File photo shows the Gyeongbokgung Palace in Seoul, South Korea. Gyeongbokgung was the main royal palace of the Joseon dynasty. Built in 1395, it is located in northern Seoul. (Photo/China News Service)
File photo shows the iconic Merlion statue in Singapore. The Merlion is the official mascot of Singapore, depicted as a mythical creature with a lion's head and the body of a fish. (Photo/China News Service)
File photo shows the Wat Phra Kaew or the Temple of the Emerald Buddha (officially known as Wat Phra Sri Rattana Satsadaram) in Thailand. (Photo/VCG)
File photo shows the Angkor Wat in Siem Reap, Cambodia. Built between 1113 and 1150 CE, encompassing an area of about 500 acres (200 hectares), Angkor Wat is one of the largest religious monuments ever constructed. Its name means "temple city." (Photo/China News Service)
File photo shows the Petronas Twin Towers, Kuala Lumpur in Malaysia. The Petronas Towers stood as the tallest buildings in the world from 1998 to 2004 and remain the tallest twin towers in the world. (Photo/VCG)
File photo shows the Taj Mahal, Agra, India. The Taj Mahal (meaning "Crown of the Palaces") was commissioned in 1632 by the Mughal emperor, Shah Jahan to house the tomb of his favorite wife, Mumtaz Mahal. (Photo/VCG)
File photo shows the Burj Khalifa, the tallest tower in the world, in downtown Dubai. The Burj Khalifa stands at 829.8 meters, making it the largest building in the world. (Photo/IC)
File photo shows the Bukhara in Uzbekistan. Bukhara is known to be Central Asia's holiest city. The buildings in this ancient city are more than a thousand years old! Back in the 16th century, Bukhara was a bustling market town on the Silk Road route. (Photo/VCG)