If you have 2 days to spend in Gelligaer, there are several things you can do:
Explore the Roman ruins which date back to the 1st century AD. This will take approximately 1-2 hours.
The Garth Woods are a beautiful natural area with many walking trails to choose from. You could easily spend a whole day exploring the woods.
Llancaiach Fawr Manor is a historical building that dates back to the 16th century. Take a tour of the building and its grounds. Allow 2-3 hours for this activity.
The Caerphilly Castle is a medieval castle that dates back to the 13th century. You can explore the castle and its grounds. Plan to spend 1-2 hours here.
This hotel is conveniently located in the heart of Gelligaer and is a great base for exploring the town and surrounding areas.
With these activities and hotel, you will have the perfect two-day itinerary in Gelligaer.