Question: The massif that contains the Riesending cave borders Berchtesgaden, Germany and what Austrian city?

Context paragraphs:
Hochkalter: At 2606.9 m , the Hochkalter in the Berchtesgaden Alps is the highest peak in the massif of the same name and therefore one of the highest mountains in Germany.  The Hochkalter Massif (German: "Hochkalterstock" or "Hochkaltermassiv") is also called the Hochkalter mountains (German: "Hochkaltergebirge").

Riesending cave: The Riesending cave (German: "Riesending-Schachthöhle" ) is a pit cave in Untersberg and the deepest and longest in Germany.  It was discovered in 1996.  In June 2014 it became well known because of a large effort to rescue a lead speleologist.

Riesending cave rescue: The Riesending cave rescue occurred between 8 June and 19 June, 2014 in Bavaria, Germany after a speleologist, who had been exploring the cave in a group of three, suffered a traumatic brain injury as a result of a rockfall.  It became famous for one of the largest efforts in the history of cave rescues, involving more than 700 people for eleven days and estimated costs of close to one million Euros.

St. Leonhard, Graz: St. Leonhard is the 2nd district of the Austrian city of Graz.  It is located in the east of the city along the Leonhardbach and stretches south to the St. Peter City Cemetery.  It borders the district of Geidorf to the north, Ries and Waltendorf to the east, Jakomini to the south and Innere Stadt to the west.

Lamkopf: The Lamkopf (also "Lammkopf") is a mountain,  m (AA) , in the Hochkönig massif within the Berchtesgaden Alps.  It lies in the Zell am See in the Austrian state of Salzburg.

Berchtesgaden Alps: The Berchtesgaden Alps (German: "Berchtesgadener Alpen" ) are a mountain range of the Northern Limestone Alps, named after the market town of Berchtesgaden located in the centre.  The central part belongs to the Berchtesgadener Land district of southeastern Bavaria, Germany, while the adjacent area in the north, east and south is part of the Austrian state of Salzburg ("Salzburger Land").

Berchtesgadener Hochthron: The Berchtesgaden Hochthron is the highest peak of the Untersberg massif in the Berchtesgaden Alps in Berchtesgaden, Bavaria, Germany.

Untersberg: The Untersberg is the northernmost massif of the Berchtesgaden Alps, a prominent spur straddling the border between Berchtesgaden, Germany and Salzburg, Austria.  The highest peak of the table-top mountain is the Berchtesgaden Hochthron at 1973 m .

Hochseiler: The Hochseiler (also "Hochsailer") is a mountain,  m (AA) , in the Hochkönig massif within the Berchtesgaden Alps.  It lies on the boundary between the districts of Zell am See and St. Johann im Pongau in the Austrian state of Salzburg.

Bratschenköpfe: The Bratschenköpfe, consisting of the "Großer Bratschenkopf" ( m (AA) ) and "Kleiner Bratschenkopf" ( m (AA) ), are two peaks in the Hochkönig massif in the Berchtesgaden Alps.  The lie in the district of St. Johann im Pongau in the Austrian state of Salzburg.

Supporting paragraphs: Riesending cave Untersberg
Answer: Salzburg