• Early Development
    • Urban tourism grew rapidly in late 19th and early 20th centuries
    • Package tours emerged in 1870s-1880s with railroad passenger departments
    • Railroads connected major US cities by 1860
    • Photography played crucial role in tourist attraction development
    Transportation Revolution
    • Automobiles transformed travel in early 20th century
    • Air travel revolutionized travel 1945-1969
    • Interstate Highway System made air travel routine
    • Mass tourism became possible after World War II
    Modern Era
    • Tourism became third-largest employer in 29 states
    • International visitor spending reached $10.9 billion in 2013
    • Florida set national tourism record with 100 million visitors in 2015
    • States adopted unique tourism slogans like "Pure Michigan"
    Recent Challenges
    • September 11 attacks caused significant industry damage
    • Tourism recovered quickly after 2001 attacks
    • Economic slowdown in 2007 affected tourism marketing
    • Amnesty International issued travel warning in 2019

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