Ordered Nested Lists in HTML

  1. Continents
    1. North America
    2. Europe
    3. Asia
  2. Oceans
    1. Deep Water
      1. Pacific
      2. Indian
      3. Atlantic
        1. One
        2. Two
        3. Three
    2. Seas
      1. Mediteranean
      2. Caspian
  3. Rivers
    1. Amazon
    2. Mississipi
    3. Danube