Ancient Engineering Achivement

The Colleseum 
Where: Rome 
Date built:  aD 70–80 It took an estimated 100,000m3 of travertine stone to build the largest amphitheatre in the Roman empire, accommodating 50,000 spectators.

Saqsaywaman
Where: Peru
Date built:  15th century Ad Scientists still don’t know how the Inca transported the massive boulders used to construct this huge walled complex in Cusco. 

Aqueduct  of Segovia 
Where: Spain
 Date built:  1st century aD it may have been constructed by the romans 2,000 years ago, but this 167- arch masterpiece still carries water from the river Frio to  the town of  Segovia today


Great pyramid  of Giza
Where: egypt
Date built:  c 2500BC the tallest  man-made structure on earth for 3,800 years, construction of the pyramid of Khufu took 100,000 workmen up to  20 years.


Stonehenge
Where: england
Date built:  From c 2500BC Our prehistoric ancestors may have transported 82 huge stones more than 200km from the Preseli Mountains of west Wales to this giant astrological observatory

Mohenjo-daro
Where: Pakistan
Date built: 2600bc this city boasted thousands of mortared brick buildings, a street plan designed to a grid and sewage systems that wouldn’t be matched in many parts of europe until the 20th century


Great Wall  of china
Where: China
Date built: Begun in  c 220bc At nearly 9,000km long – and, at points, rising to almost 1km above sea level – it’s little wonder that the Great Wall of China is arguably the most iconic of all man- made constructions.

Teotihuacan

 Where: Mexico 

Date built: 100BC–Ad 250 This Aztec metropolis was, for centuries, the largest city in the americas, and home to the third-tallest pyramid in the world, the pyramid of  the sun.

Leshan Giant Buddha

Where: China 

Date built: Begun in  aD 713 It took thousands of workers more than 90 years to complete this, the largest carved stone  buddhist in the world, standing  some 71m tall.

Antikythera Mechanism

Where: Greece 

Date built:  2nd century bc Arguably the most complex device from the ancient world, the Antikythera Mechanism is a mechanical ‘computer’ that tracks the cycles of the solar system