Here are two photos of monuments to Engineer units in the Ardennes area.
This one is standing in Neufmoulin (Belgium, Trois-Ponts area) and is dedicated to the men of the 291st Combat Engineers.
It were these men - I believe - who the infamous SS-Colonel Peiper called "Those dammed Engineers! 
'". They prevented him from crossing rivers by blowing up the bridges right before his nose. They also delayed his advance considerably. Let's not forget the major roles these men played (the war was not won only by 101st AB or 82nd AB and 2nd AD 
).
This monument is located in Redange (Luxembourg).
Dedicated to the 511th Engineer Light Ponton Company.
Sorry for the not so good quality of the photos but they were taken in 1990 (no digital camera).
Erwin
Let's not forget the major roles these men played (the war was not won only by 101st AB or 82nd AB and 2nd AD ).
Ah, you've already won my 
on this forum. 
Let's see if we can keep educating folks to that very fact. 
I have to tell you that I'm a lucky woman because I got to speak with Col David E Pergrin of the famous 291st, on a couple of occasions. He even sent signed copies of his books, First Across the Rhine and Engineering the Victory.
He's still an amazing man at this age. If I remember correctly he will be 88 this year.
We talked about his time in the ETO and he was gracious and inquired about my dad and his unit too. Not a hint of ego, but an absolutely wonderful gentleman. He knew his stuff in and out and was sharp as a tack. 
Wow, you were very lucky to have been able to speak to him!
During the 80s and 90s, I wrote to quite a number of Veterans and even had the honor of meeting a few.
Harry Traynor and Richard Bowman (both 704th TD guys) became very good friends of mine.
I also was in touch with Maj. Gen. George Ruhlen (CO 3rd Armored Field Artillery Bn - 9th Armored Division).
In 1990, I spent a month in Boston (Massachusetts) with Jim Ferullo (26th ID) and in 1992 with James Demopoulos (Engineer - later 26th ID) in Albuquerque (New Mexico).
At both occasions, I had a great time and even when I'm 85 I'll still remember them.
Erwin
Sounds like you've had some good experiences too. You will always have great memories of all the vets you've made friends with over the years. I'm sure you feel as I do; it's enriched your life and gave you a better grasp of history.
Yes, it sure put my life in perspective.
One Veteran, Kerman Arthur Sheckler (506PIR - 101AB), had a major influence on my life.
He turned my view on life around (in a positive way).
I enjoyed the honor of being in touch with all of them.
Btw, if anyone has photos of other Engineer monuments , feel free to add them here.
After August (first, I go visit my girlfriend, hopefully), I probably will be visiting the Ardennes again.
So if I encounter something, I'll post it here.
Erwin