This is the Biathlon shooting range of Biathlon and shooting club Ajax Troyan (Клуб по биатлон и стрелба Аякс – Троян).

In context of overlay "Addresses" – way/1185674425 via StreetComplete 57.4:

Possibly part of building 61

In context of overlay "Places" – Български пощи (Post Office) – node/1357847867 via StreetComplete 61.2:

Трябва да се преименува на ПТТС Панчарево-<пощ. код>

In context of overlay "Things" – Water Tap – node/1363130165 via StreetComplete 61.2:

Табела, че водата е негодна за пиене

Attached photo(s):
https://streetcomplete.app/p/300278.jpg

In context of overlay "Things" – node/13092322383 via StreetComplete 61.2:

Табела, че водата е вредна за пиене.

Attached photo(s):
https://streetcomplete.app/p/300263.jpg

In context of overlay "Things" – Drinking Water – node/13092093777 via StreetComplete 61.2:

It is disused

Градинка

via StreetComplete 61.2

Attached photo(s):
https://streetcomplete.app/p/300242.jpg

There should be a drinking water source in the vicinity of this note

Unable to answer "Is this still here?" – Telephone – node/1305105303 via StreetComplete 61.2:

Not operational

Attached photo(s):
https://streetcomplete.app/p/297123.jpg

Спорт Тото

via StreetComplete 61.1