Anyone who has seen New York City, or visited the city, know that it’s constantly evolving and growing, making it very hard to document every change that’s occurred, but a new website, called NYC Grid (run by Paul Sahner), is trying to do just that. Continue reading to see more amazing pictures.

Each location examined in this catalog presents a side-by-side look at one perspective of the designated place, revealing the differences and similarities over decades and even a century. With a moveable, dividing slider going straight down the middle, visitors are given the opportunity to shift between the past and present.

This interactive element reveals changes across time with great ease. As one shifts the slider back and forth, streetlights, modern cars, public art installations, and new buildings vanish and reappear.

Bonus Video – Trolley Ride Through NYC in Early 1900s