Here's the book that started it all:

The Important Book by Margaret Wise Brown

FANTASY
Oh, the Places You'll Go  by Dr. Seuss

MOUNTAINS
When I Was Young in the Mountains  by Cynthia Rylant

FORESTS
In the Woods : Who's Been Here?  by Lindsay Barrett George

ISLANDS
Island of the Skog by Steven Kellogg

THE OCEAN
The Magic School Bus on the Ocean Floor  by Joanna Cole

My Life With the Wave by Catherine Cowan

DESERTS
Mojave by Diane Siebert

Alejandro's Gift  by Richard Albert

RIVERS/CHINA
The Story About Ping  by Marjorie Flack

AUSTRALIA
Possum Magic by Mem Fox

Where the Forest Meets the Sea  by Jeannie Baker

Wombat Stew   by Marcia K. Vaughan

My Grandma Lived in Gooligulch by Graeme Base

Australian children's books  - List compiled by librarian

CANADA
Jessie's Island by Sheryl McFarlane

Very Last First Time by Jan Andrews

PARIS, FRANCE
The Cows Are Going to Paris  by David K. Kirby

HONG KONG
Our Home Is the Sea  by Riki Levinson

FARMS
Old MacDonald Had an Apartment House   by Judi Barrett

Charlotte's Web   by E. B. White

The Cow That Went Oink  by Bernard Most

Click, Clack, Moo : Cows That Type   by Doreen Cronin

LIBRARY
The Library  by Sarah Stewart

NEW YORK, NY
The Little Red Lighthouse and the Great Gray Bridge
by Hildegarde H. Swift

Abuela   by Arthur Dorros

Uptown   by Bryan Collier

Hattie and the Wild Waves : A Story from Brooklyn
by Barbara Cooney

Statue of Liberty books  A list of titles

PITTSBURGH, PA
Pickles to Pittsburgh : The Sequel to Cloudy With a Chance of Meatballs   by Judi Barrett

BOSTON, MA
Make Way for Ducklings  by Robert McCloskey

CITIES/TOWNS
The Gardener  by  Sarah Stewart

The Scrambled States of America   by Laurie Keller

Gooseberry Park    by Cynthia Rylant

Tar Beach by Faith Ringgold

Roxaboxen  by Alice McLerran

Cloudy With a Chance of Meatballs  by Judi Barrett

My Street by Rebbeca Treays

My Town by Rebecca Treays

TENNESSEE
Swamp Angel  by Anne Isaacs

ALASKA
A Child's Glacier Bay  by Kimberly Corral

Prince William  by Gloria Rand

MAINE
Miss Rumphius by Barbara Cooney

NORTH CAROLINA
An Island Scrapbook : Dawn to Dusk on a Barrier Island
by Virginia Wright-Frierson

CALIFORNIA
California A to Z  by Dorothy Hines Weaver, Kay

Maybelle the Cable Car  by Virginia Lee Burton

TEXAS
Armadillo Rodeo   by Jan Brett