| IBIAGA | Dolmen | Orbaizeta | URKULU – IRATI | Exacta (~25m) | Egoera onean | | |
| IBINTZA | Cromlech | Goizueta, Arantza, Nafarroa | GOIZUETA-ARTIKUTZA-ARANTZA | Exacta (~25m) | | | |
| IBIRIGAIN (Ziordia) | Dolmen | Nafarroa | SEINGAITZU | Exacta (~25m) | | | |
| IBON D' AULIOU | Cromlech | | OSSAU | Exacta (~25m) | | | |
| IBON D'AULIOU | Túmulo anular | Bearn | OSSAU | Exacta (~25m) | Nahiko egoera onean | | |
| IBON D'AULIOU | Dolmen | Bearn | OSSAU | Exacta (~25m) | Nahiko egoera onean | | |
| IBON D'AULIOU | Túmulo | Bearn | OSSAU | Exacta (~25m) | Nahiko egoera onean | | |
| IBÓN DE CULIVILLAS 1 | Túmulo | Huesca | Valle de TENA | Exacta (~25m) | | | |
| IBON DE ARLET | Túmulo | Bearn | ASPE | Exacta (~25m) | Nahiko egoera onean | | |
| IBON DE EZKAURRE | Túmulo | | BELAGOA | | Nahiko egoera onean | | |
| IBÓN DE EZKAURRE 1 ekialde | Dolmen | Nafarroa | BELAGOA | Exacta (~25m) | | | |
| IBÓN DE EZKAURRE 2 mendebal | Dolmen | Nafarroa | BELAGOA | Exacta (~25m) | | | |
| IBÓN DE LA GLERA | Cromlech | | Valle de TENA | Exacta (~25m) | | | |
| IBÓN DE LA SIERRA | Cromlech | | Valle de TENA | Exacta (~25m) | | | |
| IBÓN DE PIEDRAFITA | Cromlech | | Valle de TENA | Exacta (~25m) | | | |
| IBÓN DE PIEDRAFITA | Túmulo | | Valle de TENA | Exacta (~25m) | | | |
| IBON DE SABOCOS | Cromlech | Huesca | Valle de TENA | Exacta (~25m) | Oso kaltetuta | | |
| Ibon de SABOCOS* | Dolmen | Huesca | Valle de TENA | Destruído | Suntsitua | | |
| Ibón de SABOCOS* | Túmulo | Huesca | Valle de TENA | Destruído | | | |
| IBON DE TRAMACASTILLA | Cromlech | Huesca | Valle de TENA | Exacta (~25m) | | | |
| IBOSQUE | Cromlech | | ASPE | Exacta (~25m) | | | |
| IBOSQUE | Túmulo | | ASPE | Exacta (~25m) | | | |
| IDAGORRIA | Cromlech | | ESKALEAK - SALAGAÑA | Exacta (~25m) | Nahiko egoera onean | | |
| IDAGORRIA haut | Fondo de cabaña | | ESKALEAK - SALAGAÑA | Exacta (~25m) | Egoera onean | | |
| IDOIA | Túmulo | Nafarroa | ERRONKARI - BURGI | Exacta (~25m) | Oso kaltetuta | | |
| IDOIA | Cromlech | Nafarroa | ERRONKARI - BURGI | Aproximada (~200m) | Oso kaltetuta | | |
| IDOIETA | Cromlech | Leitza | UREPEL – BAZTARLA | Exacta (~25m) | Oso kaltetuta | | |
| IDOIKO LEPOA | Cromlech | Nafarroa | ARANO - GOIZUETA | Exacta (~25m) | | | |
| Ídolo-Guerrero de Turbil | Menhir | | Nafarroa Garaia | Exacta (~25m) | | | |
| IDOPIL IPAR | Cromlech | Nafarroa | URKULU – IRATI | Exacta (~25m) | | | |
| IDOPILGO SOROA | Cromlech | Nafarroa | URKULU – IRATI | Exacta (~25m) | | | |
| Idorra | Dolmen | | IDOKORRI – UGARRA | Exacta (~25m) | | | |
| IDORROKIA 1 erdi | Dolmen | Otsagabia | ABODI | Exacta (~25m) | | | |
| IDORROKIA 2 (Burdinzulo) | Dolmen | Otsagabia | ABODI | Exacta (~25m) | | | |
| IDORROKIA 3 ekialde | Dolmen | Otsagabia | ABODI | Exacta (~25m) | | | |
| IGARATZA | Túmulo | Gipuzkoa | ARALAR | Exacta (~25m) | | | |
| IGARATZA 4 | Menhir | Gipuzkoa | ARALAR | Exacta (~25m) | Oso kaltetuta | | |
| IGARATZA 2 | Cromlech | Gipuzkoa | ARALAR | Exacta (~25m) | | | |
| IGARATZA 3 | Menhir | Gipuzkoa | ARALAR | Exacta (~25m) | Egoera onean | | |
| IGARATZA hego | Dolmen | Gipuzkoa | ARALAR | Exacta (~25m) | | | |
| Igaratza II a | Cromlech | | ARALAR | Exacta (~25m) | | | |
| Igaratza II b | Cromlech | | Euskal Herria | Exacta (~25m) | | | |
| Igaratza II c | Cromlech | | ARALAR | Exacta (~25m) | | | |
| IGARATZA ipar | Dolmen | Gipuzkoa | ARALAR | Exacta (~25m) | | | |
| IGARATZA SUR | Túmulo anular | Gipuzkoa | ARALAR | Exacta (~25m) | | | |
| IGARTZA ekialde | Túmulo | Gipuzkoa | ATAUN - BURUNDA | Exacta (~25m) | | | |
| IGARTZA mendebal | Dolmen | Gipuzkoa | ATAUN - BURUNDA | Exacta (~25m) | Nahiko egoera onean | | |
| IGELUA | Fondo de cabaña | | NEGUMENDI - BINBALET | Exacta (~25m) | | | |
| IGITAIA | Otro / dudoso / desconocido | Bizkaia | GORBEIA | | | | |
| IGITAIA | Dolmen | Bizkaia | GORBEIA | Exacta (~25m) | Nahiko egoera onean | | |
| IGITAIA 1 | Túmulo | Bizkaia | GORBEIA | Exacta (~25m) | Oso kaltetuta | | |
| IGITAIA 2 | Túmulo | Bizkaia | GORBEIA | Exacta (~25m) | Nahiko egoera onean | | |
| IGITAIA 4 | Túmulo | Zigoitia | MONTE GORBEA | Exacta (~25m) | Nahiko egoera onean | | |
| IGORINgo Lepua I | Dolmen | Gipuzkoa | IGORIN - AKOLA | Exacta (~25m) | | | |
| IGORINgo Lepua II | Dolmen | Gipuzkoa | IGORIN - AKOLA | Exacta (~25m) | | | |
| IGURITA | Dolmen | | SIERRA DE ENTZIA | Exacta (~25m) | | | |
| IGUSTE 1 | Menhir | Nafarroa | LA SOLANA | Exacta (~25m) | Nahiko egoera onean | | |
| IGUSTE 2 | Menhir | | LA SOLANA | Exacta (~25m) | Egoera onean | | |
| IGUZKI | Menhir | | MONDARRAIN - ARTZAMENDI | Exacta (~25m) | | | |
| IGUZKI HEGO 3 | Cromlech | | OTSONDO – IPARLA | Exacta (~25m) | | | |
| IGUZKI mendebalde | Túmulo | | MONDARRAIN - ARTZAMENDI | Exacta (~25m) | | | |
| IGUZKI EKIALDE | Túmulo | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | Oso kaltetuta | | |
| IGUZKI HEGO | Menhir | Baztan | OTSONDO – IPARLA | Exacta (~25m) | Nahiko egoera onean | | |
| IGUZKI HEGO | Cromlech | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | | | |
| IGUZKI IPAR | Cromlech | | MONDARRAIN - ARTZAMENDI | Exacta (~25m) | | | |
| IGUZKI MENDEBAL | Dolmen | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | | | |
| IGUZKI mendebalde | Cromlech | | MONDARRAIN - ARTZAMENDI | Exacta (~25m) | | | |
| IGUZKIEGI | Menhir | | MONDARRAIN - ARTZAMENDI | Exacta (~25m) | | | |
| IGUZKIKO TONTORRA | Dolmen | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | | | |
| IGUZKIKO TONTORRA | Cromlech | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | | | |
| Iguzpegi 1 | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| Iguzpegi 2 | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| Iguzpegi 3 | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| IGUZPEGI 4 | Fondo de cabaña | | ANDIA | Exacta (~25m) | | | |
| Iguzpegi 6 | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| Iguzpegi 7 | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| Iguzpegi 8 | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| IHIZELAIA | Dolmen | Azkaine | LARRAONA - LIZUNIAGA | Exacta (~25m) | | | |
| IHIZELAIA | Menhir | Azkaine | LARRAONA - LIZUNIAGA | Exacta (~25m) | | | |
| IKOMARKO SAKANA | Túmulo | Andia | ANDIA | Exacta (~25m) | | | |
| ILARRAGORRI | Menhir | Eguesibar | Nafarroa Garaia | Exacta (~25m) | Nahiko egoera onean | | |
| ILARRITA | Cromlech | | ERROZATE - OKABE | Aproximada (~200m) | | | |
| ILHARRE 3 | Cromlech | | BEORLEGI | Exacta (~25m) | | | |
| ILHARRE 1 - 2 | Túmulo | | BEORLEGI | Exacta (~25m) | | | |
| ILHARREKO ORDOKIA I | Cromlech | | BISKARTZU - ORGANBIDESKA | Exacta (~25m) | | | |
| ILHARREKO ORDOKIA II | Cromlech | | BISKARTZU - ORGANBIDESKA | Exacta (~25m) | | | |
| ILHASTERIA 1 | Túmulo | | ETXEKORTIA - OLATXE | Exacta (~25m) | | | |
| ILLARBITEKO SOROA / ARRAMALETA | Cromlech | Goizueta, Nafarroa | GOIZUETA-ARTIKUTZA-ARANTZA | Exacta (~25m) | Nahiko egoera onean | | |
| ILLARBITEKO SOROA / ARRAMALETA | Túmulo | | GOIZUETA-ARTIKUTZA-ARANTZA | Exacta (~25m) | | | |
| ILLARRABELTZ | Túmulo anular | | ANDIA | Exacta (~25m) | | | |
| Illarrabeltz Sur | Túmulo anular | Andia | ANDIA | Exacta (~25m) | | | |
| ILLARRADI 1 | Túmulo anular | Goñerri | SALDISE | Exacta (~25m) | | | |
| ILLARRADI 2 | Túmulo anular | Goñerri | SALDISE | Exacta (~25m) | | | |
| ILLARRADI 3 | Túmulo anular | Ollaran | SALDISE | Exacta (~25m) | | | |
| ILLARRADI 4 | Túmulo anular | Goñerri | SALDISE | Exacta (~25m) | | | |
| ILLARRADI 1 HEGO | Túmulo | Goñerri | SALDISE | Exacta (~25m) | | | |
| Illarradi 2 Ipar | Túmulo | Goñerri | SALDISE | Exacta (~25m) | | | |
| Illasoro | Túmulo | | ARANO - GOIZUETA | Exacta (~25m) | | | |
| ILLAUN | Túmulo | Beizama | MURUMENDI | Exacta (~25m) | | | |
| ILLAUN | Dolmen | Beizama | MURUMENDI | Exacta (~25m) | Oso kaltetuta | | |
