
The Solo River is the longest river in the Indonesian island of Java, it is approximately 600 km (370 mi) in length. Apart from its importance as a watercourse to the inhabitants and farmlands of the eastern and northern parts of the island, it is a renowned region in paleoanthropology circles. Many discoveries of early hominid remains have been made at several sites in its valleys, especially at Sangiran, including that of the first early human fossil found outside of Europe, the so-called "Java Man" skull.

Bojonegoro Regency is a regency in East Java, Indonesia, about 110 km west of Surabaya. It is located in the inland part of northern Java plain, on the banks of the Solo River, the longest river in Java.

Bojonegoro subdistrict is the capital of Bojonegoro Regency, East Java, Indonesia.

Boyolali is a regency in the eastern part of Central Java province in Indonesia. Its capital is Boyolali.

Garuda Indonesia Flight 421 was a scheduled domestic flight operated by Indonesian flag carrier Garuda Indonesia travelling about 625 km from Ampenan to Yogyakarta. On January 16, 2002, the flight encountered severe thunderstorm activity during approach to its destination, suffered flameout in both engines, and ditched in a shallow river, resulting in one fatality and several injuries.

Kanor is a subdistrict of Bojonegoro Regency, East Java, Indonesia.

Karanganyar Regency is a regency in the Indonesian province of Central Java. It covers an area of 773.79 km2 and had a population of 813,196 at the 2010 Census; the latest official estimate is 871,596. Its capital is the town of Karanganyar.

Klaten is a regency in Central Java province in Indonesia. It covers an area of 655.56 km2 and had a population of 1,130,047 at the 2010 Census; the latest official estimate of population is 1,174,986. Its capital is the town of the same name.

Pasar Kliwon is one of the villages in the Pasar Kliwon in Surakarta, Central Java, Indonesia.

Pasar Kliwon is a district (kecamatan) located in the southeastern city of Surakarta, Indonesia where Kraton Surakarta is located. It is also the concentrated clearly defined-living area of Arab Indonesians, where many of the occupants make living from textile business. Pasar Klewer, the biggest batik market in Indonesia, is located within the district. Kauman, known as Batik Tourism Village, is also located in this district, which is next to Pasar Klewer.

Rembang Regency is a regency on the extreme northeast coast of Central Java Province, on the island of Java in Indonesia. The regency covers an area of 1,035.70 km2 on Java. Its capital city is Rembang.

Solo Man is a subspecies of Homo erectus, identified based on fossil evidence of 18 specimens discovered between 1931 and 1933 by Gustav Heinrich Ralph von Koenigswald from sites along the Solo River, on the Indonesian island of Java, dated to between 116,000 and 108,000 years old. The remains are also commonly referred to as Ngandong, after the village near where they were first recovered, and older remains located at Bapang.

Sragen Regency is a regency in the eastern part of Central Java province in Indonesia. Its capital is Sragen, located about 30 km to the northeast of Surakarta. Sragen is bordered with East Java Province to the east.
Sukoharjo Regency is a regency in the Central Java province in Indonesia. It covers an area of 466.77 km2 and had a population of 824,238 at the 2010 Census; the latest official estimate is 891,912. Its capital is Sukoharjo, about 10 km south from Surakarta. This regency is bordered by the city of Surakarta in the north, Karanganyar Regency in the east, Wonogiri Regency and Yogyakarta in the south as well as Klaten Regency in the west. The regency is part of the metropolitan zone of Surakarta, which is known as Subosukawonosraten.

Surakarta, known colloquially as Solo, is a city in Central Java, Indonesia. The 44 km2 city adjoins Karanganyar Regency and Boyolali Regency to the north, Karanganyar Regency and Sukoharjo Regency to the east and west, and Sukoharjo Regency to the south. On the eastern side of Solo lies Solo River. Its built-up area, consisting of Surakarta Municipality and 59 districts spread over seven regencies, was home to 3,649,254 inhabitants as of 2010 census.

Wonogiri is a regency in the southeastern part of Central Java province in Indonesia. It covers an area of 1,822.37 km2, and its population according to the latest (2017) estimate is 954,706.