When my oldest was in grade school, her class went to Chungking. We would have loved to have gone, several parents apparently wrote it off as a business expense and were puzzled that H couldn't do the same. ( He did work for Boeing, but as a machinist not an engineer or consultant & at that point was new to the company- I think we could have found a way to make it work anyway- for instance recently he was supposed to go to Italy to train workers & you can be sure I was trying to think of a way I could come along

)
You really have to stay several weeks to make the travel time worth it. I think it is would be an interesting family trip if the interest were there, and you could afford it- but I wouldn't look at it as something that would make any difference in college applications.
However- a couple thoughts. My younger daughter- as I have mentioned, is currently in Ghana installing computers in a boarding school as well as getting to know the Ghanian people, as well as she can for 2 & 1/2 weeks.
However, the group she is with, are classmates from her high school & teachers so she has already learned ( I hope) to work with them.
They also have been fundraising all year, not just for their own airfare, but for supplies to donate to the school and village. ( Students also do bulk of planning- with guidance from adults)
I think the having the time to work together before hand would add to the experience over everyone & thing being new when you arrive.
While I would love the chance to travel and work with my daughters, I also know that they get something different out of their experiences that they have away from the family.
Not better- just different & for my high school daughter- she much would prefer in most occasions to not be identified as " her mother's daughter", a side effect of my being a big volunteer and organizer from before she entered school.
When the whole financial end of programs is running into the thousands of dollars- I look at
what would I or my child get from this package that we couldn't get on our own?. Especially when on "our own" may be less expensive and more individualized to our interests.
Now Ds trip to Ghana- couldn't have been done on our own.
We don't know anyone there- she is going with a school organization that has gone to Ghana five times already, not to mention the other countries where they have run programs. This trip is also a once in a lifetime opportunity, because not only was she going somewhere that I had never even thought of going, but one of her high school counselors who used his vacation time to go along, is also from Ghana & they are visiting the village where he is Nana,
chief. Really an amazing experience I am sure.
( the students also- to emphasize did a lot of fundraising and community outreach beforehand- that alone was life changing for my daughter- she has always been a community volunteer, but to take initiative and lead projects, that is huge)
For my oldest, as a 1st grader, to go to China, for us- it wasn't even an issue. First while they had been learning Mandarin at school, ( and I had been helping with the Chinese choir after school) , they had the wonderful opportunities of working with people in the Chinese community in Seattle, learning & performing lion dance & meeting with the Chinese acrobats, I felt like
she is six, how much is she even going to remember? She is already doing more than I did when I was 16!
The primary language is English in Ghana, as it serves apparently as the common language alongside the tribal languages, so the teaching and learning my D is doing, doesn't have that barrier.
I do think that kids can teach English, a friend of older D's taught school for three years in Micronesia, after high school, but I wonder how much he would have been able to communicate in just a few weeks.
I don't mean to be a bucket of cold water- but as Libra

, I always carefully consider everything for weeks before I make a decision. Not having the money helps too.
I think that travel can be very enriching, and while my own D would prefer to be on her own ( at least away from mom) at this age, other kids may get more out of it, and it could be a wonderful way to add another layer to your relationship.
But myself, I would be more likely to be able to talk her into going to New Orleans to help rebuild, as some friends have already done with their parents. Actually as I am studying restoration horticulture, I am very interested in doing something along those lines. However- it would be lots of studying about that region beforehand.