American diplomat Nicholas Trist signs the Treaty of Guadalupe Hidalgo in Mexico City, formally ending the Mexican-American War. By signing the treaty, Mexico recognized the Rio Grande as its northern border and ceded about 55% of its pre-war territory to the United States.
Named after the New York Central Railroad, Grand Central Terminal opens in Midtown Manhattan. Grand Central, one of the biggest train stations in the world, is also one of the most visited sites in the world, with an estimated 21 million annual visitors.
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