The Great Pyramids of Giza were built by the ancient Egyptians as tombs for their pharaohs.

Pompeii was a thriving Roman city that was buried by the eruption of Mount Vesuvius in 79 AD, preserving it remarkably well.

Machu Picchu was built by the Incas in the 15th century as a royal estate and religious center.

Stonehenge was built by the Druids, a group of Celtic priests, around 2500 BC.

The concept of zero was first developed by the Indians in the 5th century BC.

The Parthenon was built by the ancient Greeks in the 5th century BC as a temple to the goddess Athena.

The system of hieroglyphics was developed by the ancient Egyptians around 3100 BC.

The Colosseum was built by the ancient Romans in the 1st century AD as an amphitheater for gladiatorial contests and public spectacles.

The concept of democracy was first developed by the ancient Greeks in the 6th century BC.

The Great Wall of China was built by the Chinese over a period of centuries, beginning in the 7th century BC.

The concept of karma and reincarnation was first developed by the Indians in the 6th century BC.

The city of Babylon was built by the Babylonians in the 18th century BC.

The concept of monotheism was first developed by the Hebrews in the 13th century BC.

The city of Persepolis was built by the Persians in the 6th century BC.

The concept of feng shui was first developed by the Chinese in the 4th century BC.