If you have 24 hours to spend in Greenock, there are some great places to visit. Firstly, you could start your day by visiting the McLean Museum and Art Gallery, where you can learn about the local history and culture. Allow at least 2 hours for this visit.
Next, you could take a walk along the Esplanade and enjoy the beautiful views of the River Clyde. This should take around an hour depending on how far you go.
For lunch, head to one of the local restaurants such as The Exchange Bar and Kitchen, which has a great menu of Scottish cuisine. Allow around 1 hour for your meal.
In the afternoon, explore the Greenock Cut, an impressive aqueduct that was built in the 19th century. This walk should take around 2-3 hours depending on your pace.
Finish off your day with a visit to the Custom House Arts Centre, which hosts exhibitions and events throughout the year. Allow at least an hour for your visit.
Overall, this itinerary should give you a great taste of Greenock and all it has to offer!