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.