[Image Source: Wikimedia]
1. Nazca Desert Plateau Lines.
Nazca desert is located in southern Peru and is famous for it's geoglyphs which resemble a lot of animals, such as killer whales, lizards, monkeys, fishes, spiders, lizards, sharks... These ground figures are best seen from a bird eye and is hard to believe they were built without any flight device. The scientists believe that they were created by the Nazca culture between 400 and 650 AD.
2. Machu Picchu.
This sacred place had been built by the incas arround 1450 who performed an impressive architecture using the so called "dry-stone walls". It was a residence for the Inca emperor and sacred place for all incas, but it was suddenly abandoned in 1572, probably because of a massive smallpox infection.
3. Giza Pyramids.
The tomb complex of the Giza plateau near Cairo consists of: Pyramid of Khufu/Cheops(largest pyramid), Pyramid of Khafre (or Chephren), Pyramid of Menkaure (or Mykerinos), The Sphinx, Tomb of Queen Khentkaues I and several smaller objects. The complex strictly follows the order of the stars in the Orion constellation.
Teotihuacan is an enormous archaeological site located 48 km northeast of Mexico City, containing some of the largest pyramidal structures in the pre-Columbian Americas. The name means "where man met the gods". Teotihuacan is also known for its large residential complexes, the Avenue of the Dead, and numerous colorful, well-preserved murals. Additionally, Teotihuacan produced a thin orange pottery style that spread through Mesoamerica.
5. Yonaguni Monument.
This is an underwater rock formation near the Rykyu Islands in Japan. It is not known whether it was built by a human hand or a natural formation, or combination of both - natural formation shaped by humans.
6. Derinkuyu Underground City.
The city was built during the reign of the empire of Medes and is now located in Nevsehir Province, Turkey, where several ancient underground cities could be seen. Derinkuyu is connected with Kaymakli, another underground city, through 80 km long tunnel. With the ability to house more than 20 000 people, the ancient facility reaches maximum depth of 60 meters.
7. Rapa Nui's Moai.
Moai are monolithic human figures carved by the Rapa Nui people from rock on the Chilean Polynesian island of Easter Island between the years 1250 and 1500. Nearly half are still at the main moai quarry, Rano Raraku, but hundreds were transported from there and set on stone platforms called ahu around the island's perimeter. Almost all moai have overly large heads three-fifths the size of their bodies. The moai are chiefly the living faces (aringa ora) of deified ancestors (aringa ora ata tepuna). The statues still watched their clan lands when Europeans first visited the island, but most were cast down during later conflicts between clans.
8. Göbekli Tepe.
Göbekli Tepe ("Potbelly Hill") is a Neolithic hilltop sanctuary positioned at the top of a mountain ridge in the Southeastern Anatolia Region of Turkey, some 15 kilometers (9 mi) northeast of the town of Sanliurfa (formerly Urfa/Edessa). It is the oldest known human-made religious structure. The place exists probably from more than 11 000 years and contains 20 round structures which had been buried, four of which have been excavated. Each round structure has a diameter of between 10 and 30 meters (30 and 100 ft) and all are decorated with massive, mostly T-shaped, limestone pillars.
Stonehenge is a prehistoric monument located on a chalky plain north of Salisbury, England. It was started 5,000 years ago and modified by ancient Britons over a period of 1,000 years. Its purpose remains unknown.
10. La Puerta De Hayu Marka.
This is called by some UFO fans the Peruvian Stargate. It is also known as “La Puerta de Hayu Marka”, or “The Gateway To The Gods”, “Aramu Muru”, and “The Doorway of the Amaru Meru”.