5. Petra, Jordan Carved into rose-red sandstone cliffs, Petra served as the capital of the Nabataean Kingdom and dates back to around 300 BC.
6. Temple of Jupiter, Baalbek At the base of the Temple of Jupiter’s ruins — one of the largest in the Roman world — rest three colossal stones known collectively as the "Trilithon." Each stone is about 20 meters long, 4.2 meters high, and weighs 750–800 tonnes.
7. Great Sphinx of Giza Believed to have been constructed during the reign of Pharaoh Khafre (c. 2558–2532 BC), the Sphinx is the oldest known monumental sculpture in Egypt.
8. Aqueduct of Segovia Constructed around the first century AD, the aqueduct is a remarkable wonder of Roman engineering. Composed of more than 25,000 granite blocks assembled without the use of mortar, it is one of the best-preserved ancient Roman structures in the world.
9. Hathor Temple The Dendera Zodiac is an Egyptian bas-relief located on the ceiling of the Hathor Temple at Dendera. It has been described as "the only map of the ancient sky," and it has been proposed as the foundation for later astronomical systems.
10. The Great Wall of China Built from the 7th century BC to protect against nomadic invasions, the wall was expanded by Qin Shi Huang and later dynasties, especially the Ming. Today, it’s recognized worldwide as an incredible feat of engineering.
11. The Erechtheion, Greece (c. 406 BC) Built around 421 BC, the Erechtheion is a stunning ancient Greek Ionic temple, famous for its Porch of the Caryatids — six sculpted female figures that serve as elegant supporting columns.
12. Karnak Temple Construction of this iconic temple complex began during the reign of Senusret I (1971–1926 BC) in Egypt’s Middle Kingdom (c. 2000–1700 BC) and continued through to the Ptolemaic period (305–30 BC).
13. Tomb of Agamemnon Also known as the Treasury of Atreus, this massive tomb was constructed between 1300 and 1250 BC in Mycenae, Greece.
14. The Mausoleum of Hadrian (123–139 AD) This masterpiece was commissioned by Emperor Hadrian as a grand mausoleum for himself and his family. At the time of its completion, it was the tallest building in Rome.
15. The Gate of All Nations, Iran It was built under the reign of Achaemenid king Xerxes I (486–465 BC), who succeeded Darius I the Great, the founder of Persepolis. The name of the monument comes from an inscription engraved on the gate.
