Here's how 12 incredible World's Fair 'leftovers' have held up over time

Since 1851, the World's Fairs have drawn millions from across the globe to exchange ideas and inventions. 

The fairs have also left behind architectural stamps, forever changing city landscapes and skylines. 

These "leftovers" represent the challenge that's posed to fair architects: build a structure that represents an idealized vision of the future.

While some of these gems — such as the Eiffel Tower and the Seattle Space Needle — have become cultural icons, every World's Fair city has its own architectural keepsake.

Photographer Jade Doskow has made exploring and documenting these sites her lifelong pursuit. "As a photographer, I’m interested in architecture that’s outlived its purpose," she told Business Insider. 

Keep scrolling for a tour of the somewhat bizarre World's Fair remains Doskow has photographed. 

SEE ALSO: 15 Gorgeous Retro-Future Photos From The 1964 World's Fair

With her photographs, Doskow begs the question, "What is that thing doing here?" Built for the 1967 World's Fair in Montreal, Canada, this geodesic dome (part of the "Man and his World" exhibition) by Buckminster Fuller is known as the Biosphere and houses an environmental museum.

Montreal 1967 World's Fair, "Man and His World," Buckminster Fuller's Geodesic Dome With Solar Experimental House (photographed in 2012)

Also from the "Man and his World" exhibit, the famed Habitat 67 is one of Doskow's favorite World's Fair structures. Designed by Canadian architect Moshe Safdie, the apartment complex brings the luxuries of suburban living to an urban environment. It has 146 residences, each with its own private terrace. Safdie was only 23 when he began the endeavor.

Montreal 1967 World's Fair, "Man and His World," Habitat ‘67 (photographed in 2012)

Doskow conducts extensive research before shooting a site. She's especially a fan of old maps from the 19th and 20th Century Fairs: "They have all these cool design elements from each era," she says. Here, a structure from New York's 1964 World's Fair stands at the New York State Pavilion.

New York 1964 World's Fair, "Peace Through Understanding," New York State Pavilion (photographed in 2008)

NOW WATCH: This drummer created a whole song using only the sound of coins