Monaco is considered a de-facto member of the Schengen zone because a traveller will need to pass through a Schengen zone country to enter Monaco. Although Monaco does not have its own visa policies, it closely follows the Schengen visa rules.
Where can I get my passport stamped? There is only one “real deal” place in Monaco that can officially stamp a passport: the Mairie de Monaco or the townhall, which is found in the Place de la Mairie on The Rock.
The citizens of Monaco are forbidden to enter the gaming rooms of the casino. The rule banning all Monegasques from gambling or working at the casino was an initiative of Princess Caroline, the de facto regent of Monaco, who amended the rules on moral grounds.