By coincidence I was saying just today that I must get back to Scotland soon, specifically to Callanish where I have dreamt of going ever since learning about the lunar standstill. When I do go I will probably be a 'tourist'.

The Heritage Trust is running a series of features on responsible tourism that may be of interest. The latest feature highlights the World Monuments Fund Sustainable Tourism Pledge. Though aimed mainly at the overseas traveller, items 6 and 10 might apply to travellers everywhere -

6. Be Gentle in Your Travel

Be mindful of visitor wear and tear. Visiting crowded sites at off-peak hours or popular destinations in the off-season will reduce your impact. Stick to marked paths. Wear comfortable footwear such as sneakers; heels can damage fragile sites. Don’t climb on monuments or touch rock carvings, as it can damage them.

10. Educate

Tell friends and family about responsible heritage tourism. Raise awareness by sharing your experiences on social media sites like Facebook and Flickr, or your own travel blog. Start a global conservation conversation!