Relief, cuts and 3D models produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved. The organisations in charge of the Copernicus programme by law or by delegation do not incur any liability for any use of the Copernicus WorldDEM-30 · Satellite images: Sentinel-2 cloudless 2016 by EOX IT Services GmbH (contains modified Copernicus Sentinel data 2016), CC BY 4.0 · Towns from GeoNames (CC BY 4.0) · River flow and catchment area: HydroATLAS / RiverATLAS v1.0, Linke et al. 2019, Scientific Data 6: 283 (CC BY 4.0); discharge from WaterGAP v2.2 · Climate: the data was obtained from the NASA Langley Research Center POWER Project funded through the NASA Earth Science Division · Base map © OpenStreetMap contributors, OpenFreeMap · Viewpoints, trails, bridges and rivers around each canyon © OpenStreetMap contributors (ODbL) · Airports from OurAirports (public domain) · Canyon names, published depths, lengths and rivers from Wikidata (CC0) · Photos from Wikimedia Commons; author and licence under each photo · Country flags from flag-icons (MIT licence)