A tipster sent us photos of what looks like a sinkhole in the Hudson River Greenway just north of 181st Street, in Washington Heights. These shots were taken Sunday morning.

We asked the Parks Department when the hole might be repaired, and whether repair work would necessitate a detour. “We are aware of the situation and we have the area cordoned off for public safety while we assess the damage,” said a spokesperson, via email.

Greenway users, let us know what you’re seeing in the area of 181st Street.

Though it’s prime cycling weather, Parks has closed another uptown stretch of the greenway — from 133rd Street to 135th Street — until December, directing users to detour onto 12th Avenue. Parks told Streetsblog in May that the Harlem greenway segment was blocked so that a utility company could stage construction equipment.