It's kind of sad watching the Sprague Street Bridge in Readville come down. Not only does it just feel like it belongs where it is - a faded relic of a faded industrial past right in the middle of a train yard/junction - it has all these really cool shapes and angles that will be replaced by some boring looking concrete thing. At the same time, if it must come down, a temporary pedestrian bridge next to the old span lets you get a really interesting, up close view of a bridge being slowly taken apart.