What you'll hear inside Mount of the Saints:

• 1
  Thingstätte

  The Thingstätte is an open-air amphitheatre built atop the Heiligenberg between 1934 and 1935, capable of holding thousands of spectators.

• 2
  Ruins of St Michael's Monastery

  The ruins of Michaelskloster perch atop Heiligenberg, a medieval monastery founded around the 11th century.

• 3
  Ruins of St Stephen's Monastery (Stephanskloster)

  The ruins of the Stephanskloster monastery lie on the Heiligenberg, a hilltop steeped in medieval history.

• 4
  Heidenloch

  The Heidenloch, literally 'heathen's hole', is a vertical shaft 55 metres deep and 3-4 metres in diameter, carved into the sandstone of Heiligenberg just west of the observation tower.

• 5
  Heiligenbergturm (Torre del Monte Sagrado)

  Heiligenbergturm is a 19th-century observation tower perched atop Heiligenberg hill, near the ruins of St Stephen's Monastery.

• 6
  Torre Bismarck (Bismarckturm / Bismarcsäule)

  The Bismarck Tower stands 15 metres high on the western slope of Heiligenberg, built between 1902 and 1903 in red sandstone by Heidelberg's student association and local citizens.

• 7
  Muralla celta (doble anillo de murallas)

  The twin ring of Celtic fortifications atop Heiligenberg represents one of Heidelberg's oldest visible remains, dating to around 500 BC.