Wentworth Prison, (Linlithgow Palace) is where Jamie is taken and assaulted by Black Jack Randall, is portrayed using the Linlithgow Palace. This English fortress is used as Wentworth Prison seen from a distance. This English castle in the Cumbrian town of Carlisle plays the part of the execution courtyard where Taran MacQuarrie is hanged
The palace serves as a backdrop for important events, particularly in the storylines involving Claire Beauchamp and her interactions with Scottish nobles. During their travels, Claire and Jamie visit Linlithgow, where significant plot points unfold, illustrating themes of loyalty, betrayal, and the impact of historical events on personal relationships. The atmosphere of the location adds depth to the characters' journeys and emphasizes the turbulent history of Scotland during the 18th century.
https://www.westlothian.gov.uk/article/47630/Linlithgow-Palace
