a foolhardy explorer
foolhardy
/ˈfül-ˌhär-dē/
adjective
foolishly adventurous and bold : rash
adventurous venturesome daring daredevil rash reckless foolhardy mean exposing oneself to danger more than required by good sense. adventurous implies a willingness to accept risks but not necessarily imprudence. venturesome implies a jaunty eagerness for perilous undertakings.