How can tourism affect beauty spots?

There are many beautiful locations all over the UK. Some of these areas are protected in terms of wildlife or developments. Tourists flock to these locations from all over the UK and the rest of the world to experience the breath taking sights and nature that they have to offer. But how does this tourism affect the areas and those that live there?
Unfortunately some people think that it is ok to drop litter and rubbish wherever they like. They will have a BBQ or a picnic and literally just dump their rubbish on the ground. This can be dangerous to the wildlife in the area and also damaging to the environment.
Often the increase in visitors to an area can cause damage to trees, plants and pathways. If there is a particular building or monument that visitors want to see, this needs to be protected. A good example of this is at Stonehenge. Stonehenge is a national legally protected Scheduled Ancient Monument and therefore the amount of tourists allowed to view it is limited. Also tourists are not allowed to get as close as they would possibly like to, to avoid damage and vandalism.