Have you ever been to Grand Rapids, Michigan? It is Michigan's second-largest city. 
No, but I haven't.  Have you been there?
I go fairly often. Grand Rapids, Michigan is right east of Lake Michigan on the Grand River. It is beautiful.
What are some of the sights or places you would recommend I visit when there?
The river it self it a huge attraction. It is the reason that Grand Rapids, Michigan's nickname is "River City"
I love rivers, so that would certainly be a good reason to visit.  Do you know how big is the population?
According to the 2010 census the population of Grand Rapids, Michigan was around 188,000.
I thought it was bigger, what are other important facts about Grand Rapids?
home to five of the world's leading office furniture companies, and is nicknamed "Furniture City". It's also been called "River City". Its more common modern nickname of "Beer City"" was given by "USA Today" and adopted by the city. The city and surrounding communities are economically diverse, based in the health care, information technology, automotive, aviation, and consumer goods manufacturing industries, among others.
Grand Rapids is the childhood home of U.S. President Gerald Ford, who is
West Michigan
West Michigan and Western Michigan are terms for an arbitrary region in the U.S. state of Michigan's Lower Peninsula. Most narrowly it refers to the Grand Rapids-Muskegon-Holland area, or more broadly to most of the region along the Lake Michigan shoreline of the Lower Peninsula, but there is no official definition for it. 
Definition.
In general, "West Michigan" often refers to the area bounded by the cities of Muskegon (in the north), Grand Rapids (in the northeast)