| 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 | | |
| Illobi 1 | Cromlech | Nafarroa | ARALAR | Exacta (~25m) | | | |
| Illobi 1 - 2 - 3 - 4 - 5 y 6 | Cromlech | | ARALAR | Exacta (~25m) | | | |
| ILSO ANGIA | Menhir | Kantabria | Ezezaguna | Exacta (~25m) | Nahiko egoera onean | | |
| ILSO DE PERUTXOTE | Menhir | Bizkaia | Bizkaia | | | | |
| ILSO GRANDE | Menhir | Kantabria | Ezezaguna | Exacta (~25m) | Egoera onean | | |
| ILSO LODOS | Menhir | Kantabria | Ezezaguna | Exacta (~25m) | Nahiko egoera onean | | |
| ILUNBETAKO ARRATE | Dolmen | Nafarroa | ARALAR | Exacta (~25m) | | | |
| ILUSIAR | Dolmen | Urbasa | URBASA | Exacta (~25m) | | | |
| INDARTEKO BORDA (6) | Campo tumular | Nafarroa | ALBA - KINTO | Exacta (~25m) | | | |
| Indarteko Borda 1 | Fondo de cabaña | Baztan | ALBA - KINTO | Exacta (~25m) | | | |
| Indarteko Borda 2 | Fondo de cabaña | Baztan | ALBA - KINTO | Exacta (~25m) | | | |
| Indarteko Borda 3 | Fondo de cabaña | Baztan | ALBA - KINTO | Exacta (~25m) | | | |
| Indarteko Borda 4 | Fondo de cabaña | Baztan | ALBA - KINTO | Exacta (~25m) | | | |
| INDIETA | Dolmen | Nafarroa | ABARTAN - SAIOA | Exacta (~25m) | | | |
| INDURIAGA | Menhir | Agoitz | BAIGURA - SALAZAR | Exacta (~25m) | | | |
| INDURIAGA | Cromlech | Agoitz | BAIGURA - SALAZAR | Exacta (~25m) | Nahiko egoera onean | | |
| INDURIAGA | Túmulo | Agoitz | BAIGURA - SALAZAR | Exacta (~25m) | Nahiko egoera onean | | |
| INGIRI | Túmulo anular | | ANDIA | Exacta (~25m) | | | |
| INGIRI 1 | Túmulo | | ANDIA | Exacta (~25m) | | | |
| INGIRI 2 | Túmulo | | ANDIA | Exacta (~25m) | | | |
| INGIRIKO PORTILLUA | Fondo de cabaña | Andia | ANDIA | Exacta (~25m) | | | |
| INGIRIKO PORTILLUA 2 | Fondo de cabaña | | ANDIA | Exacta (~25m) | | | |
| INGIRIKO PORTILLUA 3 | Fondo de cabaña | | ANDIA | Exacta (~25m) | | | |
| Intxartea | Menhir | | MONTES DE ITURRIETA | Exacta (~25m) | | | |
| INTXUSBURU | Dolmen | Gipuzkoa | ATAUN - BURUNDA | Exacta (~25m) | Egoera onean | | |
| INTXUSPE 1 ipar (Txikilantegi) | Dolmen | Nafarroa | BALENKALEKU - TXARADIGORRI | Exacta (~25m) | Nahiko egoera onean | | |
| INTXUSPE 2 hego | Dolmen | Nafarroa | BALENKALEKU - TXARADIGORRI | Exacta (~25m) | | | |
| INTZIPIDEKO LEPOA | Menhir | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | | | |
| INTZURIKO LEPOA | Túmulo | Nafarroa | SOALAR – AUTZA | Aproximada (~200m) | | | |
| INZAGA | Túmulo | Nafarroa | BELAGOA | Exacta (~25m) | | | |
| IONTENEA | Túmulo | Nafarroa | ARITZ - BELATE | Exacta (~25m) | | | |
| IONTZA | Cromlech | Nafarroa | ARITZ - BELATE | Exacta (~25m) | | | |
| IPARLA | Cromlech | | IPARLA - BAIGORRI | Exacta (~25m) | Nahiko egoera onean | | |
| IPARLA | Menhir | Nafarroa | OTSONDO – IPARLA | Exacta (~25m) | | | |
| IPARLA 1 | Menhir | | IPARLA - BAIGORRI | Exacta (~25m) | Egoera onean | | |
| IPARLA 3 | Menhir | | IPARLA - BAIGORRI | Exacta (~25m) | | | |
| IPARLAKO GURUTZEA | Menhir | Bidarrai | IPARLA - BAIGORRI | Exacta (~25m) | | | |
| IPARLAKO GURUTZEA | Cromlech | | IPARLA - BAIGORRI | Exacta (~25m) | | | |
| IPERGORTA 1 | Dolmen | Bizkaia | GORBEIA | | | | |
| IPERGORTA 2 | Otro / dudoso / desconocido | Bizkaia | GORBEIA | Exacta (~25m) | | | |
| IPINARRIETA | Túmulo | Bizkaia | OITZ | Exacta (~25m) | | | |
| IRAINGO ATAKA | Cromlech | Nafarroa, Goizueta | GOIZUETA-ARTIKUTZA-ARANTZA | Exacta (~25m) | | | |
| Iramendi | Túmulo | | GOIZUETA-ARTIKUTZA-ARANTZA | Exacta (~25m) | | | |
| IRAMENDI | Túmulo | Gipuzkoa | ARATZ - ARROBIGAÑA | Exacta (~25m) | Nahiko egoera onean | | |
| IRAÑETA | Túmulo | Villabona-Amasa | BELABIETA (Uzturre - Ipuliño) | Exacta (~25m) | Nahiko egoera onean | | |
| IRAÑETAKO PORTUA | Túmulo anular | Nafarroa | ANDIA | Exacta (~25m) | Nahiko egoera onean | | |
| IRAÑETAKO PORTUA 3 | Túmulo | | ANDIA | Exacta (~25m) | | | |
| IRAÑETAKO PORTUA I | Túmulo | Nafarroa | ANDIA | Exacta (~25m) | Nahiko egoera onean | | |
| IRAÑETAKO PORTUA II | Túmulo | Nafarroa | ANDIA | Exacta (~25m) | Oso kaltetuta | | |
| IRASTRE | Dolmen | Nafarroa | LARRUN | Exacta (~25m) | Oso kaltetuta | | |
| IRASTRE 2 | Dolmen | Nafarroa | LARRUN | Exacta (~25m) | Oso kaltetuta | | |
| IRATI-SORO IPAR | Cromlech | | ERROZATE - OKABE | Aproximada (~200m) | | | |
| IRATISORO | Túmulo | Lekunberri (Nafarroa Beherea) | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRATISORO HEGO | Cromlech | Lekunberri (Nafarroa Beherea) | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRATZA | Túmulo | | URBASA | Exacta (~25m) | | | |
| IRATZEBIZKAR 1 | Dolmen | Irun | OIARTZUN | Exacta (~25m) | Oso kaltetuta | | |
| IRATZEBIZKAR 2 | Túmulo | Irun | OIARTZUN | Exacta (~25m) | Nahiko egoera onean | | |
| IRATZEBURUA | Dolmen | | LARRAONA - LIZUNIAGA | Exacta (~25m) | | | |
| IRATZEBURUA (?) | Menhir | | LARRAONA - LIZUNIAGA | Exacta (~25m) | | | |
| IRAUA 1 ekialde | Dolmen | Nafarroa | ARITZ - BELATE | Aproximada (~200m) | | | |
| IRAUA 2 mendebal | Dolmen | Nafarroa | ARITZ - BELATE | Aproximada (~200m) | | | |
| IRAUBAZTER | Cromlech | | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRAUKO LEPOA | Cromlech | | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRAUKO LEPOA 2 | Cromlech | | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRAUKO LEPOA 4 | Cromlech | | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRAUNABAKO ERREKA 1 | Cromlech | | ERROZATE - OKABE | Exacta (~25m) | Nahiko egoera onean | | |
| IRAUNABAKO ERREKA 5 | Cromlech | | ERROZATE - OKABE | Exacta (~25m) | | | |
| IRAUNABAKO ERREKA 6 | Dolmen | | ERROZATE - OKABE | Exacta (~25m) | | | |
