American passports are strong, but not the strongest in terms of access to different countries. According to rankings from Henley & Partners, a citizenship advisory firm, the U.S. passport ranks seventh in the world when it comes to access. Americans can get into 186 international destinations without applying for additional visas in advance. Passports from New Zealand, Norway, Switzerland and Belgium have the same level of access. Weaker passports more frequently require their holders to apply for visas in advance, which can be an expensive and time-consuming process.