I’d like to share information about an excellent data source for elevation data covering Europe at 25 m resolution:
The EU-DEM was generated within the European Copernicus programme. The digital elevation model is based on combined data from SRTM and ASTER GDEM and generated for tiles of 1 by 1 degree and provided in EU-LAEA (EPSG. 3035) projection. The spatial resolution is 25 m and thus, the EU-DEM is well suited for many modeling purposes (e.g. to extract a river network for running the fish dispersal model FIDIMO). In addition to the DEM data, a colour shaded relief image over Europe is provided. Metadata for the EU-DEM are provided here.
More information about the data can be found here: http://www.eea.europa.eu/data-and-maps/data/eu-dem
and here: http://land.copernicus.eu/in-situ/eu-dem
or here with additional information on how to download and import the data into GRASS GIS (my favored GIS system): EU-DEM: new Digital Surface Model at 25m | GFOSS Blog | GRASS GIS Courses