Answer: China

When it comes to having a wide array of unique land borders, two things stack the odds in your country’s favor: sheer size combined with geographic and ethnic diversity around your country. Some countries, like Australia and the United States, have the size part down pat but either lack land borders to begin with or border other large countries and thus have very few unique points of contact with other areas.

China, on the other hand, is both an enormous country and situated right in the middle of a diverse area. It shares a whopping 19 unique land borders with 16 different countries: Afghanistan, Bhutan, Hong Kong (PR China), India (3 unique borders), Kazakhstan, North Korea, Kyrgyzstan, Laos, Macau (PR China), Mongolia, Myanmar, Nepal, Pakistan, Russia (2 unique borders), Tajikistan, and Vietnam. Even if you discount the two countries on the list that are considered “administrative regions” of China, Hong Kong and Macau, China still has more unique land borders than another other country.