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    Malatesta & Montefeltro

    Onferno caves

    Gemmano - Onferno

    The karstic complex of Onferno is considered to be among the most important in Italy both because of the caves and the chalk. It unwinds beneath the castle and parish, and originates from the erosive action of a little underground torrent, which about fifty to one hundred thousand years ago excavated its course in the dephts of the great mass on which the "Castrum Inferni" rose. It is made of grey selenite chalk from the Inferior Messianic period (5-6 million years ago), transported to Onferno a long long time ago, during some movements of the Earth's crust. In this mass the ever active river has created deeply grooved meanders, great underground rooms and long pieces of hanging chalk, which stick out, in the vaults, in various shapes. Today only a small stream of the old river remains, which runs to the right and the left of the course, fed by two courses, which start in the sala of Mammelloni (the Knoll Room). The first naturalist who attempted scientific exploration of the caves was Ludovic Quarina in 1916.

    A warning regards clothing: the cave has an average temperature of 12-14 degrees therefore we advise you to avoid too summery clothes and to take a light jacket with you, comfortable shoes too and rubber soles, considering that the course has been maintained as "natural" as possible and humidity often makes the route slippery.


    Reservation recommended. 

    Timetable 2019
    Winter and spring

    - from 1st January to 31st March: Sunday, visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m.
    - from 1st April to 15th June: Saturday, visits at 3.00 p.m. and 4.30 p.m.; Sunday, visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m.

    Summer
    - from 16 June to 31 July: Monday and Friday visits at 3.00 p.m. and 4.30 p.m.; Saturday and Sunday visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m.
    - from 1st August to 13th September: Monday to Friday visits at 3.00 p.m. and 4.30 p.m.; Saturday and Sunday visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m.

    Autumn and winter
    - from 14 September to 31 October: Saturday visits at 3.00 p.m. and 4.30 p.m.; Sunday visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m.
    - from 1st November to 31st December: Sunday visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m.

    Extraordinary openings 2019
    visits at 10.00 a.m., 11.30 a.m., 3.00 p.m. and 4.30 p.m. (possible additional shifts)
    Epiphany
    Easter and Easter Monday
    Liberation Day 25/04
    Workers' Day 01/05
    Republic Day 02/06
    Mid-August 15/08
    Halloween 31/12
    All Saints 01/11
    Immaculate Virgin Mary 08/12
    Saint Stephen 26/12
    New Year's Eve  31/12

    Access to the caves could be temporarily suspended during the year related to the protection of wildlife, maintenance or temporary unavailability of routes.


    educational centre
    meeting room with facilities
    guide services


    Not accessible to disabled guests.


    how to get there:

    by car:
    from Rimini take provincial road: SP 31 to Coriano and then provincial road SP 18 to Gemmano


    rates of entry include entrance to the Oriented Nature Reserve, Visitors’ Centre and Museum


    Opening hours

    Opening period: open all year round
    Entrance: fee payable
    Full fee:9.00 Reduced fee:7.00

    Contact details

    Via Provinciale Onferno, 50/52 - Phone: (+39) 389 199 1683 - [email protected] - http://www.facebook.com/grotta.Onferno/?fref=ts
    Onferno caves
    Via Provinciale Onferno, 50/52

    43.87256622614478; 12.545710288360624

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    Last update: 23/04/2019