Christmas Lights at the Grotto are spectacular. One of the best things about LED’s is how vibrant the colors can be,(especially the blues & violets). If possible, go on a weeknight, because the parking lots were packed, despite the frost-bitten attendants with air traffic control glow sticks doing their best to usher cars in & out. Be prepared to spend a little money though, at $ 9 for adults, kids under 3 are free. You’ll get cold before you get tired of seeing the lights.