Background: Since the 16th century, the city has had a bear pit, the Bärengraben, at the far end of the Nydeggbrücke to house its heraldic animals. The currently four bears are now kept in an open-air enclosure nearby, and two other young bears, a present by the Russian president, are kept in Dählhölzli zoo.
Question: Where is the Barengraben located?
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<extra_id_0> the far end of the Nydeggbrücke<extra_id_1>