3- Vatican city

Comprised of 108.7 acres, the Vatican is an independent state with an estimated population of 800. The city includes St. Peter's Basilica, the Sistine Chapel, the Vatican museums, a library, gardens and the Belvedere Park. The Vatican has its own broadcasting facility, currency, citizenship, flag, postage stamps, newspaper and railroad station. Potential visitors should be aware of the strict dress code when entering St Peter's Basilica: shoulders and legs (to the knee) must be covered.