The Conolly Folly, a.k.a. The Obelisk, is an obelisk structure located between Celbridge, Leixlip and Maynooth in County Kildare, Ireland. It was built in the mid-18th century by the Conolly family, then owners of the Castletown Estate. It was restored in the mid-20th century by the Irish Georgian Society, and is now a national monument in state care.

Celbridge is a town and townland on the River Liffey in County Kildare, Ireland. It is 23 km (14 mi) west of Dublin. Both a local centre and a commuter town within the Greater Dublin Area, it is located at the intersection of the R403 and R405 regional roads. As of the 2022 census, Celbridge was the third largest town in County Kildare by population, with 20,601 residents.