First, think about what kind of topic you want to explore. Wikipedia provides a good summary of topics related to historical landscapes, including, for example, the Chernobyl Exclusion Zone, the Florida Everglades, and Walt Disney World.
As you review Wikipedia articles that interest you, keep a list of key terminology, people, places, and events that you can use later when you search for academic sources, like books and peer-reviewed journal articles.
You can also search academic reference works for overview articles written by scholars on a wide range of topics. Use Credo Reference (link below) to search across our entire collection of digital, specialized encyclopedias.
Browse these reference sources or do some preliminary searching on your own to find a topic that excites you.