HM Prison Parkhurst is a prison in Parkhurst on the Isle of Wight, UK. The prison was originally a military hospital in 1778 and became a juvenile prison in the 1830s. Queen Victoria visited the prison in 1845 and wrote about it in her journal.
Park Lane is a road in the City of Westminster (London, England), located between Hyde Park and the area of Mayfair. The road was developed with aristocratic residences in the 18th century and further developed in the 19th century as a fashionable address lined with mansions.
In London Labour and the London Poor:
Park Women, or those who frequent the Parks at night and other retired places. (Volume 4)
Possibly a workhouse at St. Pancras in London. May instead refer to Penkridge Union, a workhouse in Penkridge, Staffordshire, though this seems unlikely given that the speaker, Sarah was born and lived her life in London according to the interview.