skydive / on a clear day
They are skydiving on a clear day.
hike / in the mountains
They are hiking in the mountains.
swim / in a waterfall
They are swimming in a waterfall.
dive / in the ocean (BONUS: Use "The fishes" as the subject with the verb "swim")
She is diving in the ocean.
walk or hike / in the forest
He is hiking in the forest.
climb / in a cave
He is climbing in a cave.
ride / horses / on the beach
They are riding horses on the beach.
snowboard
She is snowboarding.
surf / in the ocean
He is surfing in the ocean.
ride / a camel
They are riding a camel.
drive / a racecar
He / She is driving a racecar.
