WILLIAMS BAY, Wis. — A historic observatory near Lake Geneva is celebrating the holidays in a unique way. 

Yerkes Observatory, which was built in 1897 by the University of Chicago, reopened to the public this past spring following a several-year closure. Since reopening, the observatory has focused attention on holding educational events for the public. 

This year, the observatory is building the world’s largest glass tree. Recycled glass that was donated from nearby residents and businesses is being turned into a giant Christmas tree. 

Anyone is welcome to check out construction of the tree, which will be completed this weekend. The public can visit between 4-8 p.m. Friday, or between noon-7 p.m. Saturday and Sunday.

To learn more, visit the Yerkes Observatory website at https://yerkesobservatory.org/.