Many travel insurance policies provide cover for excursions such as visiting another country for a day or two as part of your holiday. However, check with the insurance company as there may be conditions and limits to how the cover applies.
For single trip holidays with multiple destinations, you’ll need to enter each destination you will be visiting and then check with the insurer that you are covered for all destinations – including any time spent travelling.
You could also purchase an annual multi-trip policy, which ensures you’ll be covered for all destinations, subject to your policy conditions.