Lough Tay is a lovely place to enjoy some time away from the hustle and bustle of everyday life. See if any water activities are on offer here, or simply soak up the peaceful ambiance.
When you've spent some time at this body of water in Glendalough, why not check out Wicklow Mountains National Park, Powerscourt Estate, and Powerscourt Waterfall? They're not very far from Lough Tay and also popular with tourists.