Do you need a Schengen visa?
In some cases you may need to have a visa to get permission to leave Amsterdam International Airport Schiphol for your Layover tour.
It all depends on your nationality, your destination and the lenght of stay.
You can use the online Schengen Visa Advisor to determine if you need a visa and what type of visa you need for your travel plans to or through the Netherlands.
Check here if you require a visa: