The list of answers are
they are all extreme places.
all have dangerous qualities.
only some people can visit them.
all have beautiful scenery
from all across the globe people visit these places.
very large in size.
What does the article about extreme travel tell ?
As per the passage, the article extreme travel destinations tells us about the author who is trying to share his ideas and express the quality of the places there are several pieces of evidence that he gives thought the passage. Some of them are they all are extreme places. These places can be visited by some people only. These places are very lathed in size.