Balmoral Castle

Two mounds were built on the occasion of the Diamond Jubilee of Queen Elizabeth II in 2012.

An excerpt from the article 22 facts about Balmoral Castle

In the village of Ballater (in Aberdeenshire, on the River Dee), 60 stones were laid, one for each year of Elizabeth's reign, with the main stone coming from a local quarry in Inver. A second cairn, built on the Balmoral estate, was unveiled by the Queen on August 8, 2012.

This mound was a gift to the Queen from her Scottish subjects and current and former Balmoral employees. It was topped with a stone found in the river. After the construction was completed, the last stone was poured with 10-year-old malt whiskey.