![Volcanic blocks form road-like surface which lead to name of Giant's Causeway. Northern Ireland.](/t/UIR/UIC1111.JPG) | ![Visitors climb the hexagonal blocks of Giant's Causeway. Northern Ireland.](/t/UIR/UIC1112.JPG) | ![Massive array of volcanically formed hexagonal blocks of Giant's Causeway. Northern Ireland.](/t/UIR/UIC1113.JPG) | ![Varying colors at Giant's Causeway. Northern Ireland.](/t/UIR/UIC1115.JPG) |
Volcanic blocks form road-like surface which lead to name of Giant's Causeway. Northern Ireland. | Visitors climb the hexagonal blocks of Giant's Causeway. Northern Ireland. | Massive array of volcanically formed hexagonal blocks of Giant's Causeway. Northern Ireland. | Varying colors at Giant's Causeway. Northern Ireland. |
![Varying shapes at Giant's Causeway. Northern Ireland.](/t/UIR/UIC1117.JPG) | ![Giant's Causeway step array. Northern Ireland.](/t/UIR/UIC1118.JPG) | ![Varying step shapes at Giant's Causeway. Northern Ireland.](/t/UIR/UIC1121.JPG) | ![Details of basalt columns at Giant's Causeway. Northern Ireland.](/t/UIR/UIC1124.JPG) |
Varying shapes at Giant's Causeway. Northern Ireland. | Giant's Causeway step array. Northern Ireland. | Varying step shapes at Giant's Causeway. Northern Ireland. | Details of basalt columns at Giant's Causeway. Northern Ireland. |
![Coastal view at Giant's Causeway. Northern Ireland.](/t/UIR/UIC1131.JPG) | ![Columnar formations in cliffs at Giant's Causeway. Northern Ireland.](/t/UIR/UIC1133.JPG) | ![Visitors walk Giant's Causeway. Northern Ireland.](/t/UIR/UIR1515.JPG) | ![Hexagonal basalt cores of Giant's Causeway. Northern Ireland.](/t/UIR/UIR1517.JPG) |
Coastal view at Giant's Causeway. Northern Ireland. | Columnar formations in cliffs at Giant's Causeway. Northern Ireland. | Visitors walk Giant's Causeway. Northern Ireland. | Hexagonal basalt cores of Giant's Causeway. Northern Ireland. |