By Mark Needham at Neo4j
Giannatou wrote a report Graph data mining with Neo4j (PDF) in which she shows how to import a dataset containing California’s road networks and points of interest and then write Cypher queries against it. The source code for the project is also available on GitHub.
A really cool project I came across is citygml-change-detection by Son Nguyenfrom the Department of Civil, Geo and Environmental Engineering at Technical University of Munich. This tool can be used to detect spatio-semantic changes between two arbitrarily large-sized CityGML datasets using Neo4j.