Neolithic

This rocky outcrop served as a quarry for some of the bluestones that sit at the center of Stonehenge.

There were once more than five stones in this ancient monument.

A gap marks the spot where a now-missing stone once completed the circular arrangement at this Neolithic site.

These stones date back to the 3rd or 2nd millennium B.C.

This Neolithic stone circle is the most complete of its kind in Scotland.

This collection of Neolithic monuments make up one of The U.K.'s richest archeological landscapes.

This Neolithic-era complex boasts standing stones, a cairn, and the only henge in Western Scotland.

This standing stone has a unique backdrop thanks to some of the United Kingdom's best-rated beaches.

This collection of ancient structures makes up part of the largest group of prehistoric earthworks in Britain.

Though this large circular site is now named for the legendary king, its history dates back to the Neolithic era.

Neolithic burial chambers hidden beside a village school.

Legends say this red sandstone monolith and the dozens of smaller boulders that surround it were once a coven of witches—before a Scottish wizard turned them all to stone.

This large neolithic tomb, also known as Greengraves, is hidden off a Northern Irish road.

A renovated henge and stone circle just south of Stanton Harcourt village.