Tourism is to travel to new countries, discover new cities and to take photos to remember your holidays and your activities. 
You can visit monuments or go shopping. 

My dream holidays: 

I'd like to go to Dubai. I'd like to visit the tower, swim with dolphins in a park, and jump in the sky with a parachute. 

Other activities: 
I'd like to bungee-jump / climb mountains / feed lions / swim in coral reefs. 

He has already run* a marathon. 
He has already crossed deserts. 
He has already written* a blog. 
He has never sandboarded. 
He has never tree-climbed. 
He has already snorkelled. 
He has never ridden* a turtle. 
He has already mountain-biked. 
He has already fed* fish. 

US marshals're protecting and escorting Ruby. 
She's walking to school. 
She's doing something important. 

Ruby is very brave. She doesn't look afraid.