Another example they give with está is 
 Where is the cheap restaurant in the city? 

Dónde está el restaurante barato de la cuidad?

Why wouldn't that one be dónde es then?  I guess I am not understanding the difference.

Thank you so much for your help!

A Life Lesson from the Eagle

Some years ago I learned a life lesson that I have never forgotten. I will try to summarize this story for you. Eagles are birds that can live until they're 70. When they are in their 40s they will have long and flexible talons.  Consequently they won't be able to catch any prey, the spout will be curved and the wings will be pointing to the chest.  At that time eagles have to make a choice: They can choose the death or they will go through a painful process of renewal.  If they choose death, they go to the top of a mountain and pierce their hearts with their own beaks. However if they choose the process of renewal they will go to the top of a mountain and they will rip their beaks out. With the new beak they will rip the talon out and after the new talon grows they will rip the feathers out of the wings. After this long and hurtful process then they can live 30 more years . We are like eagles.  We need to go through a process of renewal by changing our habits and the way we think.  Thus better things will replace the old things.

Do not do something unless you are going to do it well (good). Example: If you are going to run in a race, do not run in the race unless you are well prepared, have practiced and are going to run fast and do well in the race. Otherwise there is no reason to run the race. I am not sure if that was clear. I cannot think of a better example. :D

Circulation

Sea water evaporates and becomes vapor. It is cooled in the sky and becomes a cloud. The Cloud makes rain and it falls down on the ground and sea. Water circulates like this.
Herbivorous animals eat plants and carnivorous animals eat herbivorous animals. They die in due time and their dead bodies become nutrition for plants. Life also circulates like this.
People work and get money. They buy things and services from companies. They get a profit from customers and distribute the profit to their workers and stockholders. Money circulate like this.
People marry and make children. Children grow, then marry and make children. These are repeated. Even if people die, their descendants prosper. This may be a kind of circulation.
Circulation seems to be the nature of us.