National Justice Museum

This was a super interesting and well-done museum that can be seen in 1-2 hours, depending on how thoroughly you read everything.

The museum goes through topics like what is crime, forensics, historical transportation to penal colonies, how capital punishment has evolved, what prison conditions were like, etc.

It has a pretty comprehensive view, particularly focusing on the last few hundred years in Britain. Though the museum is occasionally dated looking, there is excellent signage and visuals.

What stands out compared to other similar museums, though, is the gaol representations on the lower levels, and able to physically see things like solitary confinement or dungeons.

If you purchase the joint caves ticket, note that the caves are on a separate site about a 3-4 minute walk down the street and down a few flights of stairs.

There is not parking on site, but car parks nearby. Toilets are clean and near reception.