explorer

explorer
ex‧plo‧rer /ɪkˈsplɔːrə $ -ər/ noun [countable]someone who travels through an unknown area to find out about it
     

THESAURUS

■ people who travel
   ▪ traveller British English, traveler American English someone who is travelling a long distance: Weary travellers waited at the airport. | My aunt was a great traveller. (=she travelled a lot).
   ▪ tourist someone who is travelling somewhere for a holiday: During the summer, over a million tourists visit the island each year.
   ▪ passenger someone who is travelling in a vehicle, plane, ship etc but not driving it or working on it: The driver and two passengers were killed in the crash.
   ▪ commuter someone who travels to work every day: commuters on the train to London
   ▪ backpacker someone who travels to a lot of different places, carrying their clothes etc in a rucksack: The hostels are great for backpackers.
   ▪ explorer someone who travels to places that people have not visited before: Potatoes were brought to England by explorers such as Sir Francis Drake and Sir Walter Raleigh.