If current server doesn't work please try other server below.

• S2.E1 ∙ The Railroads That Tamed the West
• S2.E2 ∙ Mount Rushmore
• S2.E4 ∙ The Telephone
• S2.E5 ∙ Domed Stadiums
• S2.E6 ∙ Gothic Cathedrals
• S2.E7 ∙ Golden Gate Bridge
• S2.E21 ∙ The Phonograph