Anonymous wrote:OP, here the plans are not that flexible, returning from a nine-day break. School and work start the following day. Returning to NYC
The layover is on your flight TO the US? Then hell no.
If you are flying from a Schengen country, you'd still need to get your bags and go back via customs to go to the US. Also, there is a secondary security at the gates for flights to the US. Just from a time persepctive...
If you land from wherever and don't need to get your bags (again, what country are you going to/coming from matters - since you are hesitant to share this we can't help)
It will take about 20-30 min to get out of the airport depending on where you land and what type of customs you need to go through.
The train ride from AMS into the Centraal station is about 15-20 minutes depending on which train you can grab. If you cab, it might take longer depending on what time you land.
Walk from Centraal station to Dam Square or the "boat rides" can be anywhere from 15-20 minutes if you are familiar with the city and a fast walker. If not - it can take longer.
Many of the boat rides need pre-purchased tickets.
Another train/cab back to the airport and back via security and customs.
I go to the Netherlands twice a year. I'm experienced in the airport, the train system and speak dutch. I wouldn't do this - but I'm interested to see if you try and it worked.