Treblinka was the location of Treblinka extermination camp, where an estimated 850,000 people were systematically murdered during the Holocaust in Poland.
About 800,000 of them were Polish Jews.

The first deportations took place in the course of the Grossaktion Warsaw with about 254,000 Warsaw Ghetto inmates brought in to their deaths in Holocaust trains in the summer of 1942.
At the layover yard of Treblinka railway station, the wagons waiting for "processing" were witnessed by Franciszek Ząbecki.
During the early period of the camp's operation, when thousands of dead bodies of victims were left unburied, the putrid odor of decaying human remains could be smelled for approximately 10 kilometers (6.2 mi) in every direction.
It was evident that mass extermination was taking place at the camp, which caused panic among the villagers.

The onset of the Warsaw Ghetto Uprising inspired renewed hopes for an escape among the Treblinka Sonderkommandos.
On 19 April 1943 one of the last Jewish transports of 7,000 victims, along with the Warsaw insurgents, were brought in for gassing.
Soon after the first prisoner uprising at a death camp against the SS erupted on 2 August 1943, under the leadership of former Polish Army officer Dr. Berek Lajcher.
Some of these prisoners were aided in escaping across the Bug River by the Polish resistance, but few survived.

The first commandant of the camp, from July 11, 1942 until 31 August 1942, was Irmfried Eberl, relieved of his duties for not being efficient and secretive enough about the camp's murder operation.
 He was succeeded by Franz Stangl (previously the commandant of Sobibor extermination camp) as the second commandant of Treblinka II Vernichtungslager from 1 September 1942 until the 1943 Jewish uprising.

The Nazi hierarchy took measures to modify the killing process under Stangl, who built more efficient gas chambers and massive cremation pyres for the incineration of corpses.
 When the Treblinka death camp ended operations in October 1943, the Nazis attempted (in vain) to remove all evidence of its existence and the mass murder carried out there.
Relatively little physical evidence remains.
It can be examined at the Treblinka museum, which is led by Edward Kopówka.
The number of visitors there has been steadily growing.

An earlier forced labor camp known as Treblinka I Arbeitslager, equipped with heavy machinery, was located 6 kilometres (3.7 mi) from Treblinka.
Between June 1941 and 23 July 1944, more than half of its 20,000 inmates mining gravel for the German military road construction, died from summary executions, hunger, disease, and mistreatment under commander Theodor van Eupen.
Treblinka was the location of Treblinka extermination camp, where an estimated 850,000 people were systematically murdered during the Holocaust in Poland. About 800,000 of them were Polish Jews. 
The first deportations took place in the course of the Grossaktion Warsaw with about 254,000 Warsaw Ghetto inmates brought in to their deaths in Holocaust trains in the summer of 1942. At the layover yard of Treblinka railway station, the wagons waiting for "processing" were witnessed by Franciszek Ząbecki. During the early period of the camp's operation, when thousands of dead bodies of victims were left unburied, the putrid odor of decaying human remains could be smelled for approximately 10 kilometers (6.2 mi) in every direction. It was evident that mass extermination was taking place at the camp, which caused panic among the villagers.
The onset of the Warsaw Ghetto Uprising inspired renewed hopes for an escape among the Treblinka Sonderkommandos. On 19 April 1943 one of the last Jewish transports of 7,000 victims, along with the Warsaw insurgents, were brought in for gassing. Soon after the first prisoner uprising at a death camp against the SS erupted on 2 August 1943, under the leadership of former Polish Army officer Dr. Berek Lajcher. Some of these prisoners were aided in escaping across the Bug River by the Polish resistance, but few survived.
The first commandant of the camp, from July 11, 1942 until 31 August 1942, was Irmfried Eberl, relieved of his duties for not being efficient and secretive enough about the camp's murder operation.  He was succeeded by Franz Stangl (previously the commandant of Sobibor extermination camp) as the second commandant of Treblinka II Vernichtungslager from 1 September 1942 until the 1943 Jewish uprising.
The Nazi hierarchy took measures to modify the killing process under Stangl, who built more efficient gas chambers and massive cremation pyres for the incineration of corpses.  When the Treblinka death camp ended operations in October 1943, the Nazis attempted (in vain) to remove all evidence of its existence and the mass murder carried out there. Relatively little physical evidence remains. It can be examined at the Treblinka museum, which is led by Edward Kopówka. The number of visitors there has been steadily growing. 
An earlier forced labor camp known as Treblinka I Arbeitslager, equipped with heavy machinery, was located 6 kilometres (3.7 mi) from Treblinka. Between June 1941 and 23 July 1944, more than half of its 20,000 inmates mining gravel for the German military road construction, died from summary executions, hunger, disease, and mistreatment under commander Theodor van Eupen.
Treblinka, Masovian Voivodeship