What is associated with: completed in 1937 this 2000 mile hiking trail passes through 14 states?

What is associated with: completed in 1930 this william van alen skyscraper in nyc is in the art deco style? What is associated with: completed in 1931 it rises over 1400 feet at 350 fifth avenue in new york city? What is associated with: completed in 1931 this structure required 10 million bricks a true stairmaster would climb its… What is associated with: completed in 1932 it bears the inscription here rests in honored glory an american soldier kno… What is associated with: completed in 1937 this span cost 35 million to build? What is associated with: completed in 1942 this dam contains about 12 million cubic yards of concrete? What is associated with: completed in 1955 this bridge crosses the hudson near nyack? What is associated with: completed in 1965 it towers 630 feet over st louis?