What is "rottenegg"

Rottenegg may refer to:

• Rottenegg, Geisenfeld, a village in Upper Bavaria, now part of the municipality of Geisenfeld
• Rottenegg, Upper Austria, a village in Upper Austria
• Rottenegg Castle, a ruined castle in Upper Austria dating to the 13th century
• Rotten egg, the characteristic smell of hydrogen sulfide