Azerbaijan, officially the Republic of Azerbaijan, is a country in the Caucasus region of Eurasia. Located at the crossroads of Eastern Europe and Western Asia, it is bounded by the Caspian Sea to the east, the Russian republic of Dagestan to the north, Georgia to the northwest, Armenia and Turkey to the west, and Iran to the south.

The Azerbaijan Democratic Republic proclaimed its independence from the Russian Empire in 1918 and became the first secular democratic Muslim-majority state. In 1920, the country was incorporated into the Soviet Union as the Azerbaijan Soviet Socialist Republic. The modern Republic of Azerbaijan proclaimed its independence on 30 August 1991, shortly before the dissolution of the USSR in the same year. In September 1991, the Armenian majority of the disputed Nagorno-Karabakh region seceded to form the Republic of Artsakh. The region and seven surrounding districts, internationally recognized as part of Azerbaijan pending a solution to the status of the Nagorno-Karabakh through negotiations facilitated by the OSCE, became de facto independent with the end of the First Nagorno-Karabakh War in 1994. Following the 2020 Nagorno-Karabakh war, the seven districts and parts of Nagorno-Karabakh were returned to Azerbaijani control.

Azerbaijan is a unitary semi-presidential republic. It is one of six independent Turkic states and an active member of the Turkic Council and the TÜRKSOY community. Azerbaijan has diplomatic relations with 182 countries and holds membership in 38 international organizations,[20] including the United Nations (since 1992), the Council of Europe, the Non-Aligned Movement, the OSCE, and the NATO Partnership for Peace (PfP) program. It is one of the founding members of GUAM, the Commonwealth of Independent States (CIS) and the Organisation for the Prohibition of Chemical Weapons. Azerbaijan also holds observer status in the World Trade Organization.

While around 97% of the population is Muslim, the Constitution of Azerbaijan does not declare an official religion and all major political forces in the country are secularist. Azerbaijan is a developing country and ranks 87th on the Human Development Index. It has a high rate of economic development and literacy, as well as a low rate of unemployment. However, the ruling party, the New Azerbaijan Party, in power since 1993, has been accused of authoritarian leadership and the deterioration of the country's human rights record, including increasing restrictions on civil liberties, particularly on press freedom and political repression.

Azerbaijan is home to a vast variety of landscapes. Over half of Azerbaijan's landmass consists of mountain ridges, crests, highlands, and plateaus which rise up to hypsometric levels of 400-1000 meters (including the Middle and Lower lowlands), in some places (Talis, Jeyranchol-Ajinohur and Langabiz-Alat foreranges) up to 100-120 meters, and others from 0-50 meters and up (Qobustan, Absheron). The rest of Azerbaijan's terrain consists of plains and lowlands. Hypsometric marks within the Caucasus region vary from about -28 meters at the Caspian Sea shoreline up to 4,466 meters (Bazardüzü peak).

The formation of climate in Azerbaijan is influenced particularly by cold arctic air masses of Scandinavian anticyclone, temperate air masses of Siberian anticyclone, and Central Asian anticyclone. Azerbaijan's diverse landscape affects the ways air masses enter the country. The Greater Caucasus protects the country from direct influences of cold air masses coming from the north. That leads to the formation of subtropical climate on most foothills and plains of the country. Meanwhile, plains and foothills are characterized by high solar radiation rates.

9 out of 11 existing climate zones are present in Azerbaijan. Both the absolute minimum temperature ( -33°C or -27.4°F ) and the absolute maximum temperature ( 46°C or 114.8°F ) were observed in Julfa and Ordubad - regions of Nakhchivan Autonomous Republic. The maximum annual precipitation falls in Lankaran (1,600 to 1,800 mm or 63 to 71 in) and the minimum in Absheron (200 to 350 mm or 7.9 to 13.8 in).

Rivers and lakes form the principal part of the water systems of Azerbaijan, they were formed over a long geological timeframe and changed significantly throughout that period. This is particularly evidenced by remnants of ancient rivers found throughout the country. The country's water systems are continually changing under the influence of natural forces and human introduced industrial activities. Artificial rivers (canals) and ponds are a part of Azerbaijan's water systems. In terms of water supply, Azerbaijan is below the average in the world with approximately 100,000 cubic metres (3,531,467 cubic feet) per year of water per square kilometer. All big water reservoirs are built on Kur. The hydrography of Azerbaijan basically belongs to the Caspian Sea basin.

The Kura and Aras are the major rivers in Azerbaijan, they run through the Kura-Aras Lowland. The rivers that directly flow into the Caspian Sea, originate mainly from the north-eastern slope of the Major Caucasus and Talysh Mountains and run along the Samur–Devechi and Lankaran lowlands.

Yanar Dag, translated as "burning mountain", is a natural gas fire which blazes continuously on a hillside on the Absheron Peninsula on the Caspian Sea near Baku, which itself is known as the "land of fire." Flames jet out into the air from a thin, porous sandstone layer. It is a tourist attraction to visitors to the Baku area.

Tourism is an important part of the economy of Azerbaijan. The country was a well-known tourist spot in the 1980s. However, the fall of the Soviet Union, and the First Nagorno-Karabakh War during the 1990s, damaged the tourist industry and the image of Azerbaijan as a tourist destination.

It was not until the 2000s that the tourism industry began to recover, and the country has since experienced a high rate of growth in the number of tourist visits and overnight stays. In the recent years, Azerbaijan has also become a popular destination for religious, spa, and health care tourism. During winter, the Shahdag Mountain Resort offers skiing with state of the art facilities.

The government of Azerbaijan has set the development of Azerbaijan as an elite tourist destination as a top priority. It is a national strategy to make tourism a major, if not the single largest, contributor to the Azerbaijani economy. These activities are regulated by the Ministry of Culture and Tourism of Azerbaijan. There are 63 countries which have visa-free score. E-visa - for a visit of foreigners of visa-required countries to the Republic of Azerbaijan.

According to Travel and Tourism Competitiveness Report 2015 of the World Economic Forum, Azerbaijan holds 84th place.

According to a report by the World Travel and Tourism Council, Azerbaijan was among the top ten countries showing the strongest growth in visitor exports between 2010 and 2016, In addition, Azerbaijan placed first (46.1%) among countries with the fastest-developing travel and tourism economies, with strong indicators for inbound international visitor spending last year.