GeoNames: 8 million global POIs
The GeoNames geographical database is available for download free of charge under a creative commons attribution license. It contains over 10 million geographical names and consists of over 8 million unique features whereof 2.8 million populated places and 5.5 million alternate names. All features are categorized into one out of nine feature classes and further subcategorized into one out of 645 feature codes.
China Historical GIS
County capitals in China for the year 1820. 1,859 POIs.
The Cultural Heritage and Activities technology District of Lazio (DTC) is an operational answer to the need of development within the Cultural Heritage and the touristic economy linked to it. Lazio Futouring, a DTC project, is the first integrated system focused on cultural tourism in the Lazio region, and includes 10 projects, currently under advanced development by the 27 companies that won the bid. Futouring has contributed about 2,000 POIs
Coverage: Rome, Italy region
DBpedia is a crowd-sourced community effort to extract structured information from Wikipedia and make this information available on the Web.The DBpedia data set contains geo-coordinates for 986,000 geographic locations.
OpenStreetMap is a free, editable map of the whole world. The main way that users participate in OpenStreetMap is by editing the map. With a free user account, you can make improvements to the map that fix issues and add data for everyone. Some users take GPS units on walks, drives, or cycling trips to record tracks that can then be imported to OpenStreetMap. Others help out by tracing roads and features they find in satellite imagery into the map.
POIs pulled out of OSM by using nodes that have at least one of these categories: