A well-known structure that's withstood the passage of time, don't miss Round Tower. It's a celebrated attraction for history buffs and regular sightseers alike.
You'll have no end of sightseeing choices when staying in Glendalough. Round Tower is an ideal place to start here, but there are lots of other fine sights to discover. The Wicklow Way, Clara Lara Funpark, and Blessington Lakes are near the historic construction and and will cap off your day nicely.