The ETIAS visa waiver for Colombians gives the holder visa-free access to all Schengen Area countries.
Excluding Ireland, all European Union countries are in the Schengen zone. There are also some additional Schengen countries which are not part of the EU: Iceland, Liechtenstein, Norway, and Switzerland, and 3 microstates: Monaco, San Marino, and Vatican City.
Some nations are in the process of joining the borderless travel zone: Bulgaria, Croatia, Cyprus, and Romania. These countries will follow the ETIAS policy, even if they are still Schengen candidates and not official members when it is introduced.
The purpose of the Schengen Area is to allow freedom of movement within its borders. All contributing countries share the same external border, permitting travelers to move between these nations with the same entry permit.
Below you can find the list of the countries you can visit with an ETIAS for Colombian passport holders.