I would probably consider using a VPN service that will enable you to connect on the Internet from another country.
Otherwise, there is no such a built-in feature in Marketo
The alternative is to ask a couple of good friends living in the EU to test you pages
I would agree with Gregoire. I have used Tunnel Bear VPN to test Marketo forms/landing pages before and it worked very well. You can select where you want to VPN in from, and it's free up to a certain usage amount as well.
Thank you Courtney and Gregoire for the feedback. I will check out Tunnel Bear and see if our IT team has any additional software apps I could use for this purpose.