Via wired.com:

There are countless ways to represent a place—neighborhoods, roads, waterlines, to name just a few. “But latitude and longitude are not the only dimensions that define a city,” says Nicolas Garcia Belmonte, a data visualization scientist at Twitter. “Whoever has biked in San Francisco, for example, can tell you the importance of knowing the topography of the city.”

Keeping the punishing hills of San Francisco in mind, Belmonte has created Andes, a three-dimensional, interactive look at where people in New York City, San Francisco and Istanbul have been tweeting from for the past four years. Belmonte used the same dataset that was developed for Geography of Tweets, an earlier project from Twitter’s Visual Insights team that visualized billions of geolocated tweets.

Check out Andes for yourself here!