Ah there! Coney Island. New York (state) 19th Century Stereoscope Card.

In 1860s, a bathing outfit could weigh as much as 20 pounds and cover up as much as the full street dress. Later, lighter-weight version features a knee-length gored skirt that buttons over a one-piece romper, topped off with a jaunty cap appeared. By the end of the 19th-century people were flocking to the oceanside beaches for popular seaside activities such as swimming, surf bathing, and diving. A need for a new style bathing suit that retained modesty but was free enough to allow the young lady to engage in swimming was obvious. By 1910 bathing suits no longer camouflaged the contours of the female body. The yards of fabric used in Victorian bathing skirts and bloomers were reduced to show a little more of the figure and to allow for exposure to the sun.

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.