Answer: The rugged terrain, the fossils of large mammals, and the herd of bison are three things that would make Serena believe she was having a real adventure.
Explanation: Serena didn't seem to be taking the journey seriously, why? because she didn't find her destination particularly interesting. since the vacation didn't excite her. She didn't think there was any reason for her to go outside. Though her buddy insisted that they could have many adventures there, Serena was not finding the trip to be particularly thrilling. Even if she couldn't believe it, she did so after learning about the unforgiving landscape, the presence of fossils, and the sight of a herd of bison.
