In Chapter XVI, when Mary goes to the theater, there is talk of all the rich families living in England at the time. Mr. Flower talks about the mayor and mayorness of Northborough and how, "They're as rich-well, as rich as Americans". Northborough is a village in Cmabridgeshire in the East of England. It is an extremely small town. Ironically there is also a Northborough, Massachussets that is home to many wealthy families which could also be the place that Mr. Flower's is alluding too instead of Northborough, England. 

Central London is the innermost part of London and is known to have a high density population, expensive land, and a  gathering of various organizations. Central London is the region where Mary and Perry initially meet and is where the Central London School of Art is located. 

In chapter 18, it is mentioned that the suffering girl ("number twenty seven") is in the hospital, and she is from Sussex. Allison feels as though she can help her, and becomes very interested in her case. Sussex is a historic county in South East England.

https://en.wikipedia.org/wiki/Sussex

A maritime city in England. In The Story of a Modern Woman, Vincent telegrammed Mary from here.

This is where The Story of a Modern Woman takes place.

An underground train station in London, England. In The Story of a Modern Woman, Mary uses this train station in chapter 15 (Dixon 15).

A German Catholic monument. It is the tallest church in the world and it took over 600 years to build.

 https://en.wikipedia.org/wiki/Cologne_Cathedral 

In The Story of a Modern Woman, Vincent Hemming shares his extravagent stories from his travels here. (Dixon 13).

In The Story of a Modern Woman, Vincent Hemming shares his extravagent stories from his travels here. (Dixon 13).