'Color Spirits Bright' This Holiday Season (Updated Dec. 5) - The Arboretum's fifth season (The Holidays) is in full swing! Highlights include a festively decorated Great Hall, Santa on site, LIVE! Holiday Music, performances of Gerald Charles Dickens 'A Christmas Carol' and holiday-themed classes at the Learning Center. With fresh snow on the ground, the exterior spaces are also taking on a whole new seasonal look. Three-Mile Drive is currently closed to vehicle traffic. Building hours are 8 a.m.-4 p.m. Monday through Saturday and 10 a.m.-4 p.m. Sundays.