Fröschengraben

Schanzengraben
Native name Schanzengraben
Schanzengraben as seen from the General-Guisan-Quai, Hotel Baur au Lac to the right
Location	General-Guisan-Quai respectively Lake Zurich–Sihl in Zürich
Coordinates	47°22′16″N 8°32′1″E / 47.37111°N 8.53361°E / 47.37111; 8.53361Coordinates: 47°22′16″N 8°32′1″E / 47.37111°N 8.53361°E / 47.37111; 8.53361
Built	around 1642
Architectural style(s)	Baroque
Governing body	City of Zürich

Schanzengraben is a moat and a section of the northwestern extension of the Seeuferanlage promenades that were built between 1881 and 1887 in Zürich, Switzerland. Schanzengraben is, among the adjoint Katz bastion at the Old Botanical Garden and the so-called Bauschänzli bulwark, one of the last remains of the Baroque fortifications of Zürich. The area of the moat is also an inner-city recreation area and, nevertheless, being officially a public park.

Schanzengraben is one of the two present effluences of the Lake Zurich, located around 250 metres (820 ft) south of the Limmat, and situated at the historical Alpenquai lake shore area, between Bürkliplatz and General-Guisan-Quai. It marks the border of the inner-city districts of Enge and City, and flows after about 1,150 metres (3,773 ft) into the Sihl, at the western side of Zürich Hauptbahnhof where Gessnerallee and Usteristrasse cross the Gessner bridge. In fact, the moat was built outside of the historical core of the medieval town of Zürich, previously the Celtic-Roman Turicum, an area being then called Aussersihl, meaning that it was outside of the Baroque town wall at the Sihl river delta.

The lake shore area also serves as a marina associated to the Hafen Enge. A narrow alley was partially built at the level of the moat, but also crosses underneath the General-Guisan-Quai and four road bridges, namely Börsenstrasse, Stockerstrasse, Pelikanstrasse and Sihlstrasse, as well as four pedestrian bridges. In addition to the so-called Seeuferanlage and its neighboring General-Guisan-Quai, there is nearby the Arboretum and the Voliere Zürich, Other attractions include the historical Enge quarter, but mainly the Old Botanical Garden and its arboretum. There is also a unique public bath just for men (Männerbad) that also serves as an event restaurant. That section of the moat is also used as a ground for canoeing and a 'water stadion' for canoe waterball. Probably the most natural part is situated nearby the mouth into the Sihl, where also some waterbirds and even fish found an inner-city refugium.