Question: What are the two other holiest cities in Islam other than the city that  is known for the Hajj?

Context articles: Hajj
Tiru Kurippu Thonda Nayanar
Lalibela
Australians in Saudi Arabia
Islam in Saudi Arabia
Antiochian Greek Christians
Islam in Liberia
Khan Ahmad Khan
Incidents during the Hajj
Holiest sites in Islam

The Hajj ( ; Arabic: ‎ ‎ "Ḥaǧǧ " "pilgrimage") is an annual Islamic pilgrimage to Mecca, the most holy city for Muslims, and a mandatory religious duty for Muslims that must be carried out at least once in their lifetime by all adult Muslims who are physically and financially capable of undertaking the journey, and can support their family during their absence.
 It is one of the five pillars of Islam, alongside Shahadah, Salat, Zakat, and Sawm.
 The Hajj is the largest annual gathering of people in the world.
 The state of being physically and financially capable of performing the Hajj is called "istita'ah", and a Muslim who fulfills this condition is called a "mustati".
 The Hajj is a demonstration of the solidarity of the Muslim people, and their submission to God (Allah).
 The word Hajj means "to intend a journey", which connotes both the outward act of a journey and the inward act of intentions.
Tiru Kurippu Thonda Nayanar was born in a Vannar family at Kanchipuram, the ancient capital of the Pallavas rulers and this rural town is now located at a distance of 76 km south-west of Chennai.
 This religious capital of South India is regarded as one of the seven holiest cities for the Hindus in India.
 and also considered as the land of devotees, poets, philanthropists, saints and savants
Lalibela (Amharic: ) is a town in Amhara Region, northern Ethiopia famous for monolithic rock-cut churches.
 The whole of Lalibela offers an exceptional testimony to the medieval and post-medieval civilization of Ethiopia.
 Lalibela is one of Ethiopia's holiest cities, second only to Aksum, and a center of pilgrimage.
 Unlike Aksum, the population of Lalibela is almost completely Ethiopian Orthodox Christian.
 Ethiopia is one of the earliest nations to adopt Christianity in the first half of the fourth century, and its historical roots date to the time of the Apostles.
 The churches themselves date from the seventh to thirteenth centuries, and are traditionally dated to the reign of the Zagwe dynasty king Gebre Mesqel Lalibela (r. ca. 1181–1221 AD).
Australians in Saudi Arabia are a sizeable community consisting mainly of expatriates.
 Their population is estimated to be anywhere up to 5,000 with the majority based in major commercial centres such as Riyadh and Jeddah.
 Most Australian citizens in Saudi Arabia tend to be occupational-oriented and are employed mainly in the health, education, construction and technology sectors.
 There are approximately 1,000 Australians who live in Jeddah alone, a city which serves as the country's main port and economic hub.
 In addition, thousands of Australian Muslims travel and stay in Saudi Arabia each year, often intending to visit the two holiest cities of Islam, Mecca and Medina.
 Many expatriates in Saudi Arabia are attracted to what they refer to as "the good life", including large salaries and tax-free jobs, consistent weather and a comfortable social life within their housing compounds.
Islam is the state religion of Saudi Arabia.
 The connection between Islam and Saudi Arabia (or at least the western Hejaz region of the country) is uniquely strong.
 The kingdom, which sometimes is called the "home of Islam", is the location of the cities of Mecca and Medina, where Muhammad, the messenger of the Islamic faith, lived and died, and attracts millions of Muslim Hajj pilgrims annually, and thousands of clerics and students who come from across the Muslim world to study.
 The official title of the King of Saudi Arabia is "Custodian of the Two Holy Mosques"—the two being Al-Masjid al-Haram in Mecca and Al-Masjid al-Nabawi in Medina—which are considered the holiest in Islam.
Antiochian Greek Christians, also known as Rûm, are an Arabic-speaking ethnoreligious Christian group from the Levant region.
 They are either members of the Greek Orthodox Church of Antioch or the Melkite Greek Catholic Church, and they have ancient roots in the Levant, more specifically, the territories of Western Syria, northern and central Lebanon, and the southern Turkish province of Hatay, which includes the city of Antakya (ancient Antioch)- one of the holiest cities in Eastern Christianity.
 Many of their descendants now live in the global Near Eastern Christian diaspora.
Islam in Liberia is practiced by an estimated 12.2% of the population.
 The vast majority of Liberian Muslims are Malikite Sunni, with sizeable Shia and Ahmadiyya minorities.
 The primary Muslim ethnic groups are the Vai and Mandingo but also Gbandi, Kpelle and other ethnic groups.
 Historically, Liberian Muslims have followed a relaxed and liberal form of Islam that is heavily influenced by indigenous religions that were integrated into Islam when it came to Liberia in the 16th century with the collapse of the Songhai Empire in Mali.
 Islamic religious practices vary in cities and towns across the country.
 Younger Liberian Muslims, particularly in the cities along the coast, tend to be more secular but still practice Islam in everyday life.
 In rural areas, Liberian Muslims are more conservative in dressing modestly, performing prayers and attending religious studies.
 The practice of Islam in Liberia has been compared to Sufi Islam common in Senegal and Gambia.
 The major Islamic holidays, Eid el Fitr, Ramadan and Eid al Adha, called Tabaski Day, are celebrated annually in Liberia.
 People have begun to go on Hajj to Mecca in recent years.
 Joint English-Arabic language, Quranic, and Muslim universities and Islamic studies schools have opened and been rebuilt in the capital Monrovia, rural towns and other cities.
 Islam appears to be experiencing revival alongside Christianity in the country as a result of the Liberian Civil War.
 America-Liberian Methodists, the first Christians in Liberia, arrived on January 7, 1822.
Khan Ahmad Khan (Gilaki/Persian: خان احمد خان‎ ‎ ), was the last king of the Karkiya dynasty in Gilan, ruling from 1538 to 1592.
 In 1591, the Safavid shah Shah Abbas (r. 1588–1629) asked Khan Ahmad Khan's daughter Yakhan Begum to marry his son Mohammad Baqer Mirza, since Khan Ahmad Khan had no male successor.
 Khan Ahmad Khan disagreed due to the age of his daughter.
 This and some other economic factors caused a Safavid raid in 1591 and Khan Ahmad Khan escaped to Ottoman territories, and spent the rest of his life in Constantinople and Baghdad, spending fruitless attempts to return to power.
 He died in 1596 and was buried in Najaf, one of the holiest cities of Shia Islam.
There have been incidents during the Hajj', the Muslim pilgrimage to the city of Mecca, that have caused loss of life.
 Every follower of Islam is required to visit Mecca during the Hajj at least once in his or her lifetime, if able to do so; the pilgrimage is one of the Five Pillars of Islam.
 During the month of the Hajj, Mecca must cope with as many as three million pilgrims.
There are numerous sites in that are considered holy to Islam.
 Mecca, Medina and Al Quds are the three holiest cities in Islam, unanimous among all sects.