If you've ever used the subways of New York - or any other major city - you probably wish the air conditioning was a little better. They can feel very cramped and sweaty during peak time. The people in this picture might have the opposite problem, though.
The photo, taken on October 27th, 1904, shows the first-ever passengers boarding New York's first-ever subway, ready to be driven 9 miles by then-major George McClellan. We're not sure we'd want to make the journey without a roof over our heads.