The Karlsteine Dolmen is a prehistoric megalithic monument located near the city of Osnabrück in the state of Lower Saxony, Germany.

Helmichsteine is a prehistoric site located near the town of Wallenhorst in central Germany.

The Dolmen di Sa Coveccada is a prehistoric megalithic structure located in the northern region of Sardinia, Italy.

The Kamenički Vis kurgan, also known as the Kinđa mound, is located in Serbia.

Killaclohane Portal Tomb, also known as the "Shrine of the Blackbird", is an ancient megalithic tomb located in County Kerry, Ireland.

The Lübbensteine are a megalithic site located in the town of Helmstedt in the state of Lower Saxony, Germany.

Kleinenknetener Steine is a prehistoric site located in Lower Saxony, Germany.

Kilmogue Portal Tomb, also known as "Harristown Dolmen," is a prehistoric monument located in County Kilkenny, Ireland.

Knockeen Portal Tomb is a prehistoric monument located in County Waterford, Ireland. It is also known as the 'Leacanabuaile Portal Tomb' or the 'Cnocín an Chinnéidigh Portal Tomb'.

Meehambee Dolmen, also known as the "The Harp Stone," is a prehistoric monument located in County Roscommon, Ireland.

Borkowo Passage Grave is a megalithic tomb located in Borkowo, Poland.

The Glantane East megalithic complex is a group of ancient standing stones located in County Cork, Ireland.