Typically you say "go back" when talking about a place that is NOT your current location, and you say "come back" when you ARE located at the place/destination.
An example will make it clearer:
I am from the United States, and I am currently living in Brazil. If I plan to move back to the U.S., then I would say "I'm going back to the U.S. next month." I say "going back" because I am currently NOT in the U.S.
But my parents, who are in the U.S., would say "Our daughter is coming back to the U.S. next month." They say "coming back" because they ARE currently in the U.S.
You go back to a place where you have traveled to before (but you don't live there). I've been to Germany before - and I'm going back to Germany for another visit next year.
You get back to a place where you typically stay / live. My husband and I just took a 3-day trip to another state, and we got back to our city this afternoon.
Here's another example - let's say I went to the store and bought some milk, but forgot to buy eggs. This means I need to go to the store again. I'd say "I'm going back to the store - I'll get back (home) in about 15 minutes."
Located in the city of Jeddah Saudi Arabia the King Fahd Fountain is famous for being the highest fountain in the world throwing water up to 1023 ft 312m that taller than the Eiffel Tower if you exclude the antenna. It uses 3 massive pumps that can deliver 625 litres of water per second at an amazing speed of 233 mph 375 km/h. Traveling to Jeddah do not forget to pay it a visit it incredible.Maximum height achieved is as the maximum height achieved is 1023ft 312m by the water is 312m 1023ft. The 3 massive pumps deliver 625 litres 165 gallons of water per second each. The water is propelled through the 126mm 5 inch nozzles at an incredible speed of 375 km/h 233mph.