Kopki, Masovian Voivodeship

Wola Karczewska [ˈvɔla karˈt͡ʂɛfska] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) south-east of Wiązowna, 9 km (6 mi) east of Otwock, and 28 km (17 mi) east of Warsaw.

Lipowo [liˈpɔvɔ] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) south-east of Wiązowna, 9 km (6 mi) east of Otwock, and 28 km (17 mi) east of Warsaw.

Malcanów [malˈt͡sanuf] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south-east of Wiązowna, 9 km (6 mi) north-east of Otwock, and 27 km (17 mi) east of Warsaw.

Wola Ducka [ˈvɔla ˈdut͡ska] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres (5 mi) south-east of Wiązowna, 8 km (5 mi) east of Otwock, and 29 km (18 mi) south-east of Warsaw.

Ostrów [ˈɔstruf] is a village in the administrative district of Gmina Celestynów, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) north of Celestynów, 9 km (6 mi) east of Otwock, and 30 km (19 mi) south-east of Warsaw.

Dziechciniec [d͡ʑɛxˈt͡ɕiɲɛt͡s] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south-east of Wiązowna, 7 km (4 mi) north-east of Otwock, and 26 km (16 mi) east of Warsaw.

The Ewa Reactor was Poland's first research nuclear reactor. Its name was derived from the first letters of the Polish words: Eksperymentalny (Experimental), Wodny (Water), and Atomowy (Atomic) as a reference to Ève Curie.

The Maria reactor is Poland's second nuclear research reactor and is the only one still in use. It is located at Narodowe Centrum Badań Jądrowych (NCBJ) (National Center for Nuclear Research) at Świerk-Otwock, near Warsaw and named in honor of Maria Skłodowska-Curie. It is the only reactor of Polish design. Maria is a multifunctional research tool, with a notable application in production of radioisotopes, research with utilization of neutron beams, neutron therapy, and neutron activation analysis. It operates about 4000 hours annually, usually in blocks of 100 hours.

Jatne [ˈjatnɛ] is a village in the administrative district of Gmina Celestynów, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north of Celestynów, 10 km (6 mi) east of Otwock, and 31 km (19 mi) south-east of Warsaw. The first mention of the village dates back to 1866. During the years 1975-1998 the town administratively belonged to the province of Warsaw.

Glina [ˈɡlina] is a village in the administrative district of Gmina Celestynów, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north of Celestynów, 6 km (4 mi) east of Otwock, and 28 km (17 mi) south-east of Warsaw.

Pęclin [ˈpɛnt͡slin] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland.

Czarnówka [t͡ʂarˈnufka] is a village in the administrative district of Gmina Wiązowna, within Otwock County, Masovian Voivodeship, in east-central Poland.