Not all countries in the world yet always open doors and welcome visitors. The country has come to travel the like are involved in an adventure dangerous and challenging.

Uzbekistan
Although the rules have been loosened a lot in this Central Asian country, tourists from western countries like the UK, The US and Canada still have to have letters of recommendation to get a visa to enter Uzbekistan. Only people among the pro-Russian countries can enter this country without a Visa.

Somali

The risk of encountering pirates and being in an unstable region caused by the war makes Somalia definitely not an ideal destination for tourism.. Moreover, the Visa procedure is quite complicated, when a separate visa is required to travel to Somaliland – the most peaceful area in the country. In addition, if the tourist is Israeli or has come to Israel, it is not allowed to enter Somalia. In this country there are no foreign consulates to deal with tourists' troubles.
Iran
Getting a visa to enter Iran is quite simple if you are not an American. However, this country does not support gay tourists, even this is a dangerous destination for them. American tourists who want to visit Iran are required to follow the tour and be supervised by a guide.
Congo

Public visa requirements are for all foreign tourists and there are no exceptions. However, the Republic of the Congo is definitely not the ideal destination because the tourism industry is still underdeveloped with poor health infrastructure.. This is also the most dangerous country in Africa due to the ongoing ethnic conflicts.
Arab – Saudi Arabia

The process to apply for a visa to Saudi Arabia is very strict. Israelis or have been to Israel are prohibited from coming to this country. Women under 30 age is not allowed to enter Saudi Arabia alone. Men and women can travel together only if married or in a group.
Angola

Traveling to Angola without a guide is very dangerous. Besides that, In this step, there are still many potentially unexploded ordnance areas. Photography should be very limited, especially if you dare to shoot the police, tourists will be hit very badly, even in prison.
Chosen

Traveling to North Korea is actually easier than many people think. However, the Korean government strictly controls the freedom of visitors. A visit to the capital Pyongyang must be under the comprehensive supervision of a guide. Koreans are especially prohibited from entering North Korea
Afghanistan

There are many reasons why Afghanistan has become a particularly dangerous destination for tourists. The country is always in a state of war and armed conflict between the government and Taliban rebels, Therefore, traveling alone and even group travel is never the right choice.
Syria

The ongoing war in Syria now makes the country a particularly dangerous destination. Only those with special duties like fund activists, journalist, new officials ventured to set foot in Syria. In addition, even if Syria is safer, traveling to this country is also very difficult because the visa procedure is cumbersome and quite expensive..