Use WASD or arrows to move forward/left/backward/right, shift/space for up/down, Q/E to zoom in/out, right click and move mouse to rotate the viewpoint, ctrl and move mouse to change the light direction.
Enter latitude+longitude (as numbers from -90 to 90 for S-N and -180 to 180 for W-E) and press "Go" (or enter).
Some peak labels might not render correctly, use "Load additional fonts" to fetch additional fonts (Arabic, Chinese, Japanese, Korean) from fonts.google.com
Data sources: