OpenTopography provides high-quality geographic data relating to earth science as well as a platform for researchers to share their own data. Based at the University of California, San Diego, OpenTopography is an ambitious project that “facilitates community access to high-resolution, Earth science-oriented, topography data, and related tools and resources,” and is funded through the National Science Foundation.
You can search or browse the project’s datasets via an interactive data map and a data catalog, both found under Data. Most of these datasets are available in Lidar point cloud format, and many are also available in other formats, such as raster or Google Earth. Check it out!