The seven wonders of the ancient world were real world structures present during classical antiquity and were considered great landmarks by the Greeks during the 4th century BC. The following list contains those seven (listed first), as well as others that were not known to the Greeks at that time. These wonders are often featured in mythological worlds, historical worlds, paranormal worlds, or worlds with an exploration component. These buildings are also commonly featured in alternative timelines, where they may serve some other, more secretive or fantastic purpose.

Built over a period of 26 years from 2584 to 2561 BC, the Great Pyramid of Giza is the largest Egyptian pyramid. It is the tomb of the Fourth Dynasty pharaoh, Khufu. It contains three main chambers. The Great Pyramid is the only member of the seven wonders of the world that still stands today.

Built in or around 600 BC, the Hanging Gardens of Babylon were a series of terraced gardens containing trees, shrubs, vines, and all manner of other plants. By one legend, the gardens were built by King Nebuchadnezzar II for his wife, Queen Amytis, who missed the green hills of her homeland. It is unknown if the Gardens ever truly existed, and their location has never been definitely established.

The Statue of Zeus was a 12.4 meter, 41 foot tall sculpture of the god Zeus seated on a throne. It was built by the Greek sculpture Phidias around 435 BC.

The Temple to the Greek Goddess of the hunt, Artemis, was built and destroyed multiple times. The third and last version has the largest, and measured 137 m (450 ft) long by 69 m (225 ft) wide and 18 m (60 ft) high, with more than 127 columns supporting the roof. According to the 2nd century Acts of John, John the Apostle prayed before the temple and as he did so “the altar of Artemis split in many pieces… and half the temple fell down.”

Built from 353 to 350 BC, the Mausoleum at Halicarnassus was a 45 meter, 148 foot tall tomb for the ruler of Caria, Mausolus (his name is where the generic term for an above ground tomb, Mausoleum, is derived) and his sister-wife, Artemisia II.

A 33 meter, 108 foot tall statue of the Greek sun god Helios that was located on the breakwater of the Rhodes harbor (or on a pedestal near it). Built in 292 BC, it collapsed 60 years later due to an earthquake.

Built between 280 and 247 BC, the Lighthouse of Alexandria stood 100 meters, 330 feet tall. It was the tallest manmade structure for centuries.

Constructed sometime between 3000 and 2000 BC, Stonehenge is a series of stone rings that align towards sunrise of the summer solstice. It may have been a place of burial.

Portions of the Great Wall date to the 7th century BC (though the best known portions were built much later by the Ming dynasty between 1368-1644 AD.