Here’s a beautiful map of most of NYC’s buildings, with age represented as color. Pink is on the early end of the spectrum, with buildings dating back to the 1830s, and yellow mark’s the city’s most recently-constructed buildings, with everything in between in shades of purple, blue, and green. Go and mess around a little bit. How old is your home? Your work? (Mine appear to be from 1901 and 1920, respectively).

The map was created by¬†Brandon Liu, a 24-year-old designer from San Francisco using the NYC’s PLUTO open data set (the same data behind this great map from last month). “In the past it’s cost thousands of dollars to acquire this data,” Liu told The Atlantic Cities.¬†“Building age was the most interesting aspect of the data set to me, and it was quite simple to combine building footprints with age.”