One of the cities of Marmara Region on the Sakarya Valley and along the E-5 state road. The Sakarya (Sangrion) River passes by the city which helps the local agricultural economy tremendously. Original name of this city was Tığcılar during the 16^th Century, but because of its view as an island since it is situated in between of two rivers (Sakarya and Çarksuyu) and vegetable and fruit markets were set up here, the city, in time, took the name of Adapazarı (=Island Market). As it was a small village before, due to the migration of the people from the areas lost by the Ottoman Empire in the 19^th century and the Bagdat Railways passing from this place, caused Adapazarı to improve economically and industrially, and became the capital city of Sakarya Province.

Being a pretty new city, the only historical remain in the city is Victor Orhan's Mosque which was renovated during the 19^th century. The places of interest would be Tersiye Tumulus which is dated to the 1^st century AD in the Küçük Esence (Küçük Tersiye) Village of Adapazarı, Küçücek Village Tumulus, again dating to the 1^st century AD, is about 31 kms./19 miles to the south-east of the city, Kaynarca and Akgöl (White Lake) are the natural resorts and camping areas around Adapazarı.

When you happened to be in this province and, therefore, in Adapazarı, make sure to visit the Sakarya Museum and see the old mosques, bridges and castles.