Duncansby Stacks are located on the north-east coast of Scotland, in Caithness, near the village of John O'Groats. They are a stunning natural rock formation, consisting of two large sea stacks known as the Duncansby Stacks, and several smaller ones. The two main stacks are called the Stacks of Duncansby, and they rise up to a height of over 60 meters. The sea stacks are made of sandstone and are believed to have been formed during the last Ice Age.

The Duncansby Stacks are a popular tourist destination and can be accessed by a short walk from the Duncansby Head lighthouse. The walk is relatively easy, with a well-maintained path and spectacular views of the coast, cliffs, and sea stacks. Visitors can also take boat trips from John O'Groats to get a closer look at the stacks and the wildlife that inhabits the area, including seabirds such as guillemots and kittiwakes.

The Duncansby Stacks are a popular spot for birdwatching, as the cliffs and sea stacks provide nesting sites for a variety of seabirds. Visitors can also see other wildlife in the area, such as seals and dolphins. The area around the stacks is also popular for fishing and sea kayaking, and there are several beaches and coves to explore. Overall, the Duncansby Stacks are a must-visit for anyone exploring the rugged and scenic coast of Caithness.