A person who goes on an expedition is typically referred to as an "expeditioner." Depending on the context, they may also be called explorers, adventurers, or researchers, especially if their journey is for scientific or exploratory purposes. These individuals often seek to discover new territories, conduct research, or engage in adventure activities.
They are traveling to explore or experience something in one form or another, a hunting trip to africa could be called an expedition, and a sight-seeing trip to china could also be called an expedition.
A person who goes up in a balloon is called a passenger or a balloonist.
A person who goes into water headfirst is called a diver.
A person who goes on a pilgrimage is called a pilgrim.
Anyone who goes into space is called an Astronaut, or Cosmonaut.
# ====== ---- ====== ====== That person is called a canadient
this person is called a pedestrian
A quitter!
whooo
A person who is not a member of Congress but goes there to speak about and to advance a particular cause is called a lobbyist.
this person is called a soldier
They are treasonous and are called traitors.