Underground Rome - The Tiber Island and St. Nicholas in Prison Small Group Exclusive Tour

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What To Expect

Here's a fascinating way to discover ancient Rome underneath the cobblestones of the Baroque Rome! It's for anyone fascinated with the mysteries of places ignored by the "normal" tourists. Go to Tiber Island, the "island between the two bridges," and learn all the legends and myths surrounding the Island. Visit the church of San Nicola in Carcere (St. Nicholas in Prison), absolutely unique in the world! Even at a distance, you can see the six imposing columns of an ancient Roman temple built into the side walls of the church.


Underground Tours in Rome
Departs From:
Meeting Point:
San Bartolomeo Square - in Tiberina Island
2 hours
Monday, Wednesday, Friday and Sunday at 10:30 AM
Product Code:
Voucher info:
Paper voucher printout not required for this activity. You may show e-voucher from your mobile device.
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Rome City Tours & SightseeingRome Private ToursCity Tours & SightseeingPrivate Tours


The Tiber Island is one of the two islands in the Tiber river, which runs through Rome. Located in the southern bend of the Tiber, the island is boat-shaped, approximately 270 m long and 67 m wide, and has been connected with bridges to both sides of the river since antiquity.

Being a seat of the ancient temple of Asclepius and later a hospital, the island is associated with medicine and healing. The island has been linked to the rest of Rome by two bridges since antiquity, and was once called Insula Inter-Duos-Pontes which means "the island between the two bridges."

From the island, you will reach an ancient church that hides the remains of three ancient temples, namely, the temple of Spes (Hope), Juno Sospita (Junio the Savior) and Janus. It was once thought that these cells could have been the prison of St. Peter (hence the name "carcere" which means prison).

From the crypt under the altar, you will descend to the underground level and arrive in the spaces - at the time open to the sky - between the three temples. You are on the beaten path of the Romans, who for centuries passed this way on their daily comings and goings to the vegetable and cattle market a few steps away. The foundations and the massive load-bearing structures of the temples survived the collapse and devastation of the centuries, wars and destruction.

During the reconstruction, around the 9th century AD, the strong arms of the temples where reused to anchor a church. On the inside of the church, among the many historical details, one of the columns preserves an interesting engraving from the 8th century AD, while the bell in the medieval tower is still the original one from the end of the 13th century AD.


  • Expert archaeological guide

  • Entrance fee


  • Meals and drinks

  • Personal expenses

  • Tips and gratuities

  • Optional activity costs

  • Hotel pick-up and drop-off

Please Note

  • Tour will be operated as a guaranteed Small Group Tour with a maximum of 10 guests.

Cancellation Policy

  • 25% Cancellation Fee (75% reimbursement): 45 days prior to date of activity.
  • 50% Cancellation Fee (50% reimbursement): between 16 to 44 days prior to date of activity.
  • 100% Cancellation Fee (no reimbursement): 15 days or less prior to date of activity.

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