2. is the art and science of designing buildings and structures.

4. Stonehenge Location: Salisbury, England Date: 2750 to -1500 BC Building Type: Temple, observatory Construction System: stone

6. The Great Pyramids Location: Giza, Egypt Date: 2630 BC - 1759 BC Type: tomb Construction System: stone cut

8. Nashville, TN The Parthenon Location: Athens, Greece Date: -477 to -438 Building Type: Temple Construction System: cut stone

10. Hanging Gardens of Babylon Location: Babylon Date: 450 BC Type: Palace Construction System: stone cut

12. Colosseum Location: Rome, Italy Date: 70 to 82 Building Type: Amphitheater Construction System: cut stone

14. Hagia Sophia Location: Istanbul, Turkey Date: 532 to 537 Building Type: church Construction System: cut stone

16. Notre Dame Cathedral Location: Paris, France Date: 1163 to 1250 Building Type: Cathedral / church Construction System: cut stone Gothic

18. Taj Mahal Location: Agra, India Date: 1630 to 1653 Type: Islamic tomb Construction System: inlaid marble

20. 2143 windows, 1252 fireplaces, and 67 staircases. The gardens include1400 fountains. Chateau de Versailles Location: Versailles, France Date: 1661 to 1774 Building Type: Royal Palace Construction System: Cut Stone

22. Eiffel Tower Location: Paris, France Date: 1887 to 1889 Building Type: Observation Tower Construction System: iron

24. The White House Location: Washington, D.C. Date: 1824 to 1829 Type: mansion Construction System: stone cut

26. Biltmore House Location: North Carolina, USA Date: 1888 to 1895 Building Type: mansion

28. Antoni Gaudi Location: Barcelona, Spain Date: 1852- 1926 Building Type: Construction System: concrete

30. Falling Water Location: Ohiopyle, PA. Date: 1948 Type: house Construction System: concrete/ stone

32. Taipei 101 Location: Taipei, Taiwan Date: 2003 to 2004 Building Type: office tower Construction System: concrete/steel

34. Hydropolis Location: Dubai Date: 2006 Building Type: hotel Construction System: glass Hydropolis is about to take shape 20m below the surface of the Arabian Gulf, just off the Jumeirah Beach.