Final answer:
The information provided does not specify the region where Mark Kolowich established businesses and bank accounts to launder money. However, the Caribbean, particularly the Cayman Islands, is noted for offshore banking facilities used for similar purposes.
Step-by-step explanation:
The region mentioned in relation to Mark Kolowich in the context of establishing businesses and bank accounts for the purpose of laundering money is not directly specified in the provided information. However, the passage on offshore banking mentions the Caribbean, particularly the Cayman Islands, as places where businesses and individuals set up financial accounts outside the jurisdiction of other countries for tax evasion purposes. This practice contributes to the high standard of living and considerable national wealth of such regions. Meanwhile, in the case of historical figures like Al Capone, laundering through front businesses was part of their operation strategy to conceal the origins of their illicit income. It's important to note that Mark Kolowich's specific actions or affiliations are not detailed in the information given.