Having said that, some people simply go to a foreign resort (4)______ by high walls and therefore learn little about their holiday (5)_______ . Another issue is that hordes of tourists often spoil the “unspoilt” places they visit. The most recent example of this is Antarctica, where last year cruise ships took thousands of visitors to view the disappearing icebergs and wildlife. Vegetation, nesting penguins and resting walrus are vulnerable when humans intrude.