The remains of the Castle can be visited
Tantallon Castle

Tantallon Castle is a castle ruin in Scotland, rising on a high cliff on the south coast of the Firth of Forth. Its strategic location opposite Bass Rock makes it medieval defensive architecture.
History+
The origins of Tantallon Castle date back to 1358. William Douglas, who claimed his inheritance after returning from France and became the head of the House of Douglas by murdering his godfather, presumably had the castle built in that year. After his death in 1384 and the early death of his heir James in 1388, the House of Douglas split into two lines, with Tantallon falling to the Earls of Angus. In 1491, the castle withstood a siege by James IV's troops with minor damage. Another siege in 1528 by James V led to a change of ownership and subsequent modernizations of the fortifications.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: Maciek Wegrzyn
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 56.0565, -2.6504