Currently, a United States passport is not the most powerful passport in the world, and having a second one could open up more travel options. From fewer visa applications to shorter customs lines, it may be worth looking into your current options.

If you have a grandparent, or even a great-grandparent, who is from another country, you may be able to obtain a passport from their birth country as well.  Here are four countries in which you may be able to use grandma’s name to claim a second passport.

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United Kingdom

If you can prove that one of your grandparents was born in the United Kingdom, then you can set out on the three-step processes of obtaining a second passport. First, you have to apply for a UK Ancestry Visa, then after five years you can apply for permanent settlement, and one year after that, you can apply for citizenship.

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Ireland

According to the Irish Foreign Ministry, if one of your grandparents was born on the island of Ireland, or one of your parents was an Irish citizen at the time of your birth, even though they were not born on the island of Ireland, you can apply for Irish Citizenship.

Italy

In Italy, there is no limit to how far back you reach to obtain citizenship. No matter how many generations back, as long as your ancestors maintained their citizenship until they had children, you could be eligible. All you need are birth or marriage certificates to prove it.

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Spain

According to the Ministry of Foreign Affairs, European Union and Cooperation of Spain, after living in Spain legally for one year, you can apply for Spanish citizenship if one of your grandparents was originally from the country.

Lithuania, Germany, and Hungary have similar laws to the four countries previously mentioned, mostly having to do with lost citizenship due to war, deportation or political imprisonment.  If you believe you have ancestors from these regions, it’s certainly worth looking into your options.