It's something you sleep in.
sleeping bag
a journey made by a group of people explore (explorers)
expedition
It's like a small house where you stay when you go camping
tent
It's big bag which you carry on your back
rucksack
a trip, travelling from one place to another
journey
a natural underground place in a hillside
cave
It's something you use to see in the dark
torch/ flashlight
it's above a place
north
water falling from a high river or stream
waterfall
It's someone who travels to a new place to learn about new places.
explorer