1. VATICAN CITY

Vatican City is a country located on the continent of Europe. It is the smallest, independent state on Earth, with an area of only 44 hectares. It is located inside the city of Rome; Italy and its official language is Latin. This is the center of the Roman Catholic Church, the main sect of Christianity, and this is the residence of the Pope, the supreme religious leader of this sect. Vatican City has no airport, so if you want to explore this city then you will have to fly to Rome's Leonardo da Vinci Airport instead, and then take a taxi, which takes about 35 minutes. 

2. MONACO

Monaco is a small country located in South West Europe. It is situated on the north-central coast of the Mediterranean Sea. It is surrounded by France on three sides and is just 16 km away from Italy. It is commonly called a tax haven and most of its citizens are wealthy and belong to foreign countries. It is famous for the glamorous Monte Carlo Casino, the Formula One car race as well as the luxurious life of the royal family. It is the second smallest French-speaking country in the world and has no airport to reach. You'll need to fly into Nice's Cote d'Azur airport, then take a 30-minute taxi to Monaco.

3. ANDORRA

Andorra is a small country located in the southwest of Europe, it is a landlocked country that is 90% surrounded by mountains and only 5% of the land is suitable for cultivation. Andorra is located between France and Spain with an area of 468 square kilometers. It is the only country on earth where the official language is Catalan. The country of Andorra doesn't even have its own airport, although you can travel there via Spain or France, both of which border the small nation in close proximity. The nearest airport is Seo De Urgel in Spain, and it takes about 35 minutes by car to get to Andorra, or you can drive from Barcelona or Toulouse.

4. SAN MARINO

San Marino is an enclave (landlocked) in Southern Europe surrounded by Italy, on the border between the regions of Emilia Romagna and the Marche, and about 10 km (6.21 mi) from the Adriatic coast at Rimini. Its mountainous topography, with no flat land, is part of the Apennine Mountain range. The official language of San Marino is Italian, although Romanagol is a historical language and is still in existence in a non-official capacity. San Marino also doesn't have its own airport. The drive from Federico Fellini Airport in Rimini takes approximately 30 minutes. San Marino is best accessed from Italy.

5. LIECHTENSTEIN

Liechtenstein is a small country situated between Austria and Switzerland. It is one of the smallest countries in Europe; its capital is Vaduz and the largest city is Shchan. Liechtenstein is the only German-speaking Alpine state in the world, located entirely on the Alps and the Rhine River flows along its western border. It is the only German-speaking state that does not share a border with Germany. But you cannot fly to Liechtenstein as there is no airport. The best way is to fly to Zurich and then take a short taxi, or train to Buchs or Sargons on the Swiss border.