The Glasgow Tower, part of the city's science centre, has been relaunched after £1.8 million was spent refurbishing the 127m structure, including fixing problems with its lifts.
It offers visitors views across the city, taking in some of its most famous landmarks, including the Scottish Exhibition and Conference Centre, the new Hydro, the Clyde Arc, or the Squinty Bridge as it is known, Glasgow University and Ibrox Stadium.
The £10 million tower, which is the only structure in the world capable of rotating 360 degrees into the prevailing wind, first opened in 2001 but was beset by problems.
Lift failures led to an incident in 2005 when 10 people were trapped for several hours while other maintenance problems resulted in closures, with the tower eventually shut in 2010.
The science centre entered court proceedings against the contractors of the structure and received compensation, which partially funded the refurbishment work.
Science centre chief executive Stephen Breslin said: "We are very excited to be reopening the Glasgow Tower this weekend.
"We had a number of engineering issues that we had to resolve and for the last couple of years we have focussed on finding a solution.
"We are very confident that we have found that solution and we have been implementing it for the last eight months, and we are now at the point where we are ready to reopen the tower.
"We have completely redesigned the lifts, so it is a much lighter design which minimises the wear on the racks.
"We have implemented a number of safety measures which mean that nobody should ever be stuck in the lifts again.
"We are hoping that many thousands of people over the remainder of the summer will come and visit."
The tower reopens to the general public this weekend but some people, Science Centre Passport holders, were allowed up to the top today to celebrate the occasion.