What's causing these tiny sinkholes along Offaly's grand canal greenway?
These pictures showing possible subsidence happening near the boardwalk at Lock 26 on the greenway were taken by a user recently.
These fairly deep holes have appeared in the tarmac and may be a cause for concern for users who may walk into one unknowingly.
The Grand Canal Greenway has become hugely popular in the last few months in Offaly with thousands of users taking to it on foot and by bicycle.
Offaly County Council have been contacted by the Offaly Express on this issue but have not yet responded to requests for a statement on the holes.