Yes, a Hungary Tourist Visa grants you access to all 29 Schengen member states on a single visa. This means you can travel to countries such as Austria, Germany, France, Italy, Greece, and other Schengen nations without requiring a separate visa for each country. However, your total stay across all Schengen countries combined must not exceed 90 days within any 180-day period. It is important to note that the Schengen visa does not grant access to non-Schengen countries such as the United Kingdom or Ireland, which require separate visas.