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Cave of Sejanus: A Journey Through Roman History

Explore an ancient Roman tunnel offering a unique blend of history and stunning coastal views in Naples, Italy.

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The Cave of Sejanus is an ancient Roman tunnel that connects the Archaeological Park of Pausilypon to the sea. This remarkable feat of engineering offers visitors a unique glimpse into Roman history and stunning coastal views of Naples.

A brief summary to Cave of Sejanus

  • Tuesday 9 am-11 am
  • Wednesday 9 am-11 am
  • Thursday 9 am-11 am
  • Friday 9 am-11 am
  • Saturday 9 am-12:15 pm
  • Sunday 9:15 am-12:15 pm

Local tips

  • Book your visit in advance, as access to the Cave of Sejanus and the Pausilypon Archaeological Park is by reservation only.
  • Wear comfortable shoes, as the descent to the cave is steep and the terrain within the park can be uneven.
  • Visit early in the morning to avoid crowds and enjoy a quieter atmosphere.
  • Bring a camera to capture the breathtaking views of the coastline and the archaeological remains.
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Getting There

  • Public Transport

    From Posillipo, take bus line C21 towards the Coroglio area. Get off at the 'Coroglio - Discesa Coroglio' stop. From there, walk approximately 300 meters down Discesa Coroglio to reach the Cave of Sejanus entrance. The bus fare is approximately €1.50.

  • Walking

    From Piazza Sannazaro in Posillipo, walk towards Via Posillipo and continue along the waterfront. After about 1 km, turn left onto Via Coroglio. Continue straight for approximately 500 meters until you see signs for 'Gaiola' or 'Cave of Sejanus'. The entrance is located at Discesa Coroglio, 36. Be prepared for a steep descent.

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Discover more about Cave of Sejanus

The Cave of Sejanus, or Grotta di Seiano, is more than just a cave; it's a 770-meter-long Roman tunnel that burrows through the tuffaceous hill of Posillipo. Constructed in the 1st century BC by Cocceius Auctus, the same engineer behind other significant tunnels in the area, it linked the Roman villa of Pausilypon to Pozzuoli. The tunnel allowed Vedius Pollio, the villa's owner, to easily access his clifftop estate. Over the centuries, the cave fell into disuse but was later reopened and reinforced by the Bourbons in 1841. Today, visitors can explore this ancient passageway, marveling at the blend of Roman engineering and Bourbon restoration. The tunnel is ventilated by three air ducts that open to the sea, creating a fascinating play of light and shadow. Emerging from the tunnel, visitors find themselves immersed in the Archaeological Park of Pausilypon, where they can explore the remains of Vedius Pollio's luxurious villa. The site includes a theater, an odeon, and a nymphaeum, all offering breathtaking views of the Gulf of Naples. The Cave of Sejanus and the Pausilypon Archaeological Park together provide a unique blend of history, architecture, and natural beauty.

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