A hole in a Manhattan sidewalk has grown large enough that New Yorkers can look down and see subway trains running right underneath their feet, frightening photos taken Tuesday morning show.

Top left: Joe Linton shared this image of a sidewalk that has deferred to the tree in West L.A. on Ohio Avenue. Top right: Michael Peraza shared this image of a crumpled sidewalk in the 600 block ...

DULUTH — There won't be much vehicle traffic on Superior Street from Lake Avenue to Fifth Avenue West for a few days, but there will be plenty of foot traffic for the annual Sidewalk Days downtown.

The company collects high-resolution video and images to identify sidewalk cracks, tripping hazards, and other surface distortions. “Being a walkable and bikeable city is a huge priority for us ...