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 UNIT 2 
ECHOES OF 
THE PAST 
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     LESSON 4 • MYSTERIES OF OUR WORLD
 
 
  
 
 
 
 
 
 UNIT 2 
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   LESSON 4 • MYSTERIES OF OUR WORLD 
 
 
 We use the Simple Past to talk about ............................................................................................................................... 
We use the Present Perfect to talk about .......................................................................................................................... 
 
 
 
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     LESSON 4 • MYSTERIES OF OUR WORLD
 
 
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 ![]() UNIT 2 
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       LESSON 4 •  MYSTERIES OF OUR WORLD
 
    
  
 
1. Work in groups. Investigate one of the world mysteries below in order to make a presentation 
 
 
  
    
  
     to your class. Look back at page 24 for tips on how to prepare your project. Easter island 
• Stonehenge 
• The Great Pyramid • The Sphinx • Baalbeck • Tiahuanaco • Easter island statues • Ollantaytambo • Sacsayhuaman • Kailasa Temple • Al-Khazneh 2. Research the monument you have chosen. You can find information by looking through 
newspapers and magazines, relevant books or online sources such as www.world-mysteries.com / www.mysteriousplaces.com / www.discoverychannel.ca. The following questions might help you: 
• When were these monuments made? By whom? • Where were they found? • What were they like? • Who discovered them? • What materials were used to build them? • Which were the most important artifacts found? • Who lived there? • What were they originally used for? UNIT 2 
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