Aiud is an important tourism centre in terms of agrotourism, ecotourism and cultural tourism.
The city centre is historical and is home to many landmarks, such as the Aiud Citadel, City Hall, museums and churches.
Aiud Citadel (Cetatea Aiudului in Romanian) is located in the center of Aiud, and was built during medieval times (14th century), comprising many buildings. It is the main tourist attraction of Aiud. The citadel is fairly small, with a perimeter of 350 metres, and it is in the form of an irregular pentagon. The earliest documented evidence of the citadel extant today dates from 7 November 1293, a privilege issued by King Ladislaus IV - King of Hungary (1272–1290), but local tradition holds that the first stone watch tower was finished during the Mongol invasion of Europe in 1241. Other important events for the citadel: the serfs uprisings from 1437; the conquest of Michael the Brave; the Habsburg attack in 1704 and 1717; the Christian uprising - Religious war in 1758 - 1761; the peasant movement from 1784 and the Revolutionary wave of 1848 - 1849.
Due to its strong educational culture, which dates back to the foundations of the city, the Students' Monument (Monumentul studentesc) is the oldest monument in Aiud. It is located in the beautiful City Park, and was erected in memory of the students who fought against the Habsburg invasion in 1704. The monument was erected in 1904, 200 years after the invasion.
The "Calvarul Aiudului" Monument is a modern monument in remembrance of the suffering and deaths during the Communist regime of Romania. The monument, started in 1992, is made up of many crosses (6 metres tall), symbolising the traditions of Romania. In the Communist era, Aiud was an important centre where the elite of the Communist resistance were buried, and the "Calvarul Aiudului" monument seeks to remember those. The monument is located just outside the city centre, in the southwest.
The City Hall of Aiud is located right in the centre of the city, at No. 1 Consiliul Europei street, close to the Aiud Citadel. The edifice, built in the 1890s, is built in the majestic style of those times, with balconies, statues, decorations and wonderful interiors.
Aiud is home to two major public museums. They are the Museum of History (temporarily closed due to renovations starting in 2013) and the Museum of Natural Science. The history museum was built in 1796 and is housed in a historical building. There is a large collection of coins, as well as medieval and pre-medieval artifacts. The collection of the Museum of Natural Sciences dates back from 1720. It is based mainly on zoology, as well as botany, paleontology and geology.
Most of Aiud's population are Christian, but they also come from a variety of denominations, including Catholicism and Eastern Orthodoxy and well as Reformed, Unitarian, Baptist and Evangelical faiths. Therefore, there are places of worship for all these religions.
The Orthodox Cathedral is located in the southeast of the city, and is an impressive building with high ceilings and wonderful domes. It was built after the unification of Transylvania with the rest of Romania (Wallachia and Moldavia) on 1 December 1918. The construction started in 1927 and went on for some decades. The architecture was inspired from the St. Sofia church in Istanbul, and is built in Byzantine style.
The Roman Catholic Church, albeit being smaller and less imposing that the Orthodox Cathedral, is still very beautiful, built in baroque style. Also, it is situated in Cuza Vodă Square, surrounding the medieval Aiud Citadel, making the Church very ideal in terms of surroundings. The church contains a large organ as well as stained glass windows which were painted by an artist from Budapest.
The Reformed Church mainly serves the Hungarian minority of Aiud, which played a big role in the identity of the city in terms of education, art, architecture and more. Their church is arguably the most memorable of the three main churches, because it is located right in the Aiud Citadel, and is medieval in architecture style, being the oldest church in Aiud.
The most famous monastery in the Aiud area is the Râmeț monastery, which was built in the 15th century. Its architecture is classically Romanian, resembling the painted monasteries of Moldavia such as Voronet. In the monastery there is also a museum. In addition to Râmeț monastery, there are also monasteries at Magina and Cicau.
The Bethlen Gabor College, with 1011 students today and a rich history, is Aiud's most important educational institution. The college, named after Gabriel Bethlen, Prince of Transylvania (1613–1629), was founded in 1622 in Alba-Iulia, the capital city of Alba County, and it was then moved to Aiud. Later on, it was also moved to Cluj-Napoca for a short time. Today, the institution is located in a 19th-century historical building, and it is also home to an important library.
Center of political life in Aiud in the 19th century.
As well as rich culture, Aiud is also littered with wonderful scenic tourist attractions in terms of the environment. There are also many activities available throughout the year, especially in fishing and hunting. This provides a strong base for ecotourism in the area, as there are beautiful forests, hills and mountains and fresh air.