The Graben is one of the most famous streets in Vienna’s first district, the city centre. It begins at Stock-im-Eisen-Platz next to the Palais Equitable and ends at the junction of Kohlmarkt and Tuchlauben. Another street in the first district is called Tiefer Graben . It is crossed by Wipplinger Straße by means of the Hohe Brücke, a bridge about ten metres above street level.

More details: https://en.wikipedia.org/wiki/Graben%2C_Vienna