San Marino is a country situated in the Apennine Mountains. It is a landlocked, being completely surrounded by Italy. It's one-tenth the size of New York City with an estimated population of almost 30,000.
San Marino has the smallest population of all the members of the Council of Europe. Their constitution, enacted in 1600, is the world's oldest constitution still in effect.
Entering into the Country is simple since, for tourism purposes, no passports are required and millions of visitors arrive each year from all over the world.
I remember visiting San Marino over 30 years ago during a stay in Italy. The main reason for going, apart from the spectacular location, was bargain shopping and the colourful entry stamp they placed in your passport if you carried it with you!