House Built Inside A Mountain, Alps, Switzerland

• Northern Limestone Alps (from the Wienerwald to Bregenzerwald), including the Flyschzone; peaks up to 3,000 metres (9,840 ft)
• Central Eastern Alps (Austria, Switzerland); peaks up to 4,050 metres (13,290 ft)
• Southern Limestone Alps (Austria, Italy, Slovenia)
The border between the Central Alps and the Southern Limestone Alps is the Periadriatic Seam. The Northern Limestone Alps are separated from the Central Eastern Alps by the Greywacke zone.