Looking along the bridge from Brooklyn to New York

Stereographs are devices capable of building a three-dimensional​ image out of two photographs that have about two and a half inches difference between them so that it could imitate the two eyes’ real field of view. Combining these images into a single one with the help of stereoscope, a person can experience the illusion of the image’s depth. Stereoscope uses the same principle as in human binocular vision. Our eyes are separated by about two inches, so we see everything from two different angles. When the brain combined those views in a single picture, we get the spatial depth and dimension. Stereographs were extremely popular between 1850 and 1930 all around the world. Millions of stereographs were made during that time. There was a broad range of themes: landscape, travel, historical moments, nature disasters, architecture and many others. Nowadays, simply launch this collection full screen and put your mobile device in Google Cardboard Viewer.

The history of New York City's transportation system. New York City is distinguished from other U.S. cities for its low personal automobile ownership and its significant use of public transportation. New York is the only city in the United States where over half of all households do not own a car (Manhattan's non-ownership is even higher, around 75%; nationally, the rate is 8%). New York City has, by far, the highest rate of public transportation use of any American city. New York City also has the longest mean travel time for commuters (39 minutes) among major U.S. cities. The Second Industrial Revolution fundamentally changed the city – the port infrastructure grew at such a rapid pace after the 1825 completion of the Erie Canal that New York became the most important connection between all of Europe and the interior of the United States. Elevated trains and subterranean transportation ('El trains' and 'subways') were introduced between 1867 and 1904. Private automobiles brought an additional change for the city by around 1930, notably the 1927 Holland Tunnel.