I was just writing a little piece for my parish on Eucharistic Adoration and found a nice resource I wanted to share with you.
The Real Presence Eucharistic Education and Adoration Association has compiled an impressive map and listings of places in the US, Canada, and Puerto Rico which offer times of Eucharistic Adoration. As their name indicates, they offer a number of resources on the topic as well, including an option to download their listing onto your mobile device to more easily find a chapel while you're traveling.
Obviously, I can't vouch for their accuracy (so you may want to call to confirm details if you're traveling a while to get to one of these chapels), but I did check the ones I personally know of and they were all accurate and included mapquest links to show the way.
What a very nice resource, and thank you to those who have made it possible!