Movies

Sometimes small groups of people have to face monsters on their own, outside of normal society.

Sometimes a group with a reasonable number of people get injured and nibbled down to a small group.

In the Land Unknown, a US Navy team enters a volcano and gets trapped with their helicopter.

Sometimes people are transported by submarine or aircraft to a place where dinosaurs still exist.

Othertimes, they are sent through time to deal with a world that is not their own.  I have all these movies on video and have seen them many times.  They are all great in their own way.