Metal fencing has been placed around Hartshead Pike in Ashton because of safety concerns.
The Grade-II listed tower, which dates back to the 18th century, is one of the borough's best-known landmarks.
Fencing and a health and safety notice was put around the historic site by the council.
A Tameside Council spokesperson told the Reporter on Monday: “Due to the age and location of Hartshead Pike, we are in the process of carrying out structural surveys to establish the level of repair work that we will need to undertake.
"We have put up some temporary fencing around the Pike as a precaution and would just ask that people don’t go beyond this fencing and to please bear with us while we carry out the initial works."
Primary schools begin partnership with Stamford Park Trust ahead of formal join
Call for volunteers to help make Stalybridge Carnival’s 50th anniversary parade the biggest yet
Jigsaw Homes staff raise more than £14,000 for men’s mental health charity
How every Greater Manchester council intends to tackle ‘family voting’ in the upcoming May elections
