The Empire State Building in New York City is one of the world?s most visited buildings. The tall office building was built in 1931, during a period known as the Great Depression. Find out more in Empire State Building, a title in the Structural Wonders of the World series. Structural Wonders of the World is a series of AV2 media enhanced books. Each title in the series features easy-to-read text, stunning visuals, and a challenging educational activity. A unique book code printed on page 2 unlocks multimedia content. These books come alive with video, audio, weblinks, slideshows, activities, hands-on experiments, and much more.