Thank you for choosing "Tunnel Acoustics" for this week's gallery! 

You know I love this feature, and even moreso at the end of a week when I've been too busy to give the galleries the attention I would have liked.  What a treat to go through this selection and catch up on some truly spectacular images I'd missed!  Congratulations to everyone in Week 41, and thanks to the staff for all your hard work! 

"If your pictures aren't good enough, you're not close enough."  ...  Robert Capa