Standing stones have been erected by different cultures throughout history, and their age varies widely depending on the specific location and culture. Here are a few examples:

- Carnac Stones (France): The Carnac Stones in Brittany, France, are one of the most famous megalithic sites in the world and are estimated to date back to around 3300-2900 BC.

- Stonehenge (United Kingdom): Stonehenge, a prehistoric monument in England, is believed to have been constructed in several stages, with the earliest phase dating back to around 3000-2000 BC.

- Göbekli Tepe (Turkey): Göbekli Tepe, an archaeological site in southeastern Turkey, features some of the world's oldest known standing stones and is estimated to date back to around 9500-8000 BC.

- Neolithic Era Monuments (Europe): Various standing stones and megalithic structures found across Europe, such as the Ring of Brodgar in the Orkney Islands (Scotland) or the Newgrange passage tomb in Ireland, date back to the Neolithic period (around 4500-2000 BC).

- Native American Standing Stones: Some standing stones and ceremonial structures associated with Native American cultures in North America, such as the Medicine Wheel in Wyoming or the Sun Dagger petroglyph in Utah, vary in age and can date back to different periods, including more recent times.

These examples illustrate the wide range of ages associated with standing stones, spanning several millennia and originating from different cultures and regions of the world.