I'm 29 and planning a solo 2/3-week trip to Europe in September to hopefully round out my goal of visiting 30 countries before I turn 30 (I have 3 to go!). The trip will start off by visiting family in Liechtenstein, but then considering the following:
Option 1) Scandanavia tour: Sweden, Norway, Finland
Option 2) Croatia, Montenegro, Slovenia
Option 3) UK Tour: Ireland, Northern Ireland, Scotland, Wales
Any input on safety/affordability/and best areas to visit in September would be greatly appreciated. Thank you!