Europe may include some of the most popular travel destinations for Americans, but the US State Department advises that several countries on the continent may require extra caution for those looking to vacation abroad.
Business Insider: The riskiest vacation hot spots in Europe
Stand-up paddler Kerstin Dudichum makes her way on the river Main as in background can be seen the skyline of the banking district in Frankfurt am Main, western Germany, on June 13, 2019.
