What all the tunnels underneath #NiagaraFalls looked like at one time. (Ignore the ornate gate in the FG) #scary #yayscience!

via Instagram http://ift.tt/1fky4zQ

Follow me on Instagram: http://ift.tt/124UAGf

Follow me on Flickr: http://ift.tt/1in4DQz

Follow me on 500px: http://ift.tt/1cvpOIu