The main attractions at the 1904 World's Fair, officially known as the Louisiana Purchase Exposition, included:
- Festival Hall: The central exhibit building, which showcased various exhibits on art, culture, and industry.
- Palace of Agriculture: This massive building displayed advancements in agriculture, featuring exhibits on farming techniques, crops, and livestock.
- Palace of Electricity: Showcasing the wonders of electricity, this building housed demonstrations of electrical power, lighting, and appliances.
- Palace of Machinery: Highlighting the industrial progress of the era, this building displayed machinery and manufacturing advancements.
- Palace of Transportation: Exhibiting various modes of transportation, including trains, automobiles, and airplanes, this building focused on advancements in travel and transportation.
- Anthropology Exhibit: A popular attraction, this exhibit showcased cultures and artifacts from around the world, emphasizing indigenous peoples.
- St. Louis Zoo: Established during the fair, the St. Louis Zoo became one of its lasting legacies, featuring a diverse collection of animals from around the world.
- Missouri State Building: Designed in the Beaux-Arts style, this building served as the showcase for the state of Missouri and an architectural marvel in itself.
- The Ferris Wheel: Originally built for the 1893 Chicago World's Fair, the Ferris Wheel was moved to St. Louis and became a major attraction, providing panoramic views of the fairgrounds.
- Pike: The entertainment zone of the fair, Pike offered various amusement rides, sideshows, and food vendors, attracting millions of visitors.
These were some of the main attractions, but the fair also featured numerous other buildings, exhibits, and events that showcased industrial, scientific, and cultural progress of the early 20th century.