United States of America, Utah, Zion National Park. Early morning light on the geological features of the Zion National Park.

New Zealand, Nelson & Marlborough, Golden Bay. Limestone outcrops near the summit of Takaka Hill.

New Zealand, Nelson & Marlborough, Golden Bay. Limestone landscape of the Grove Scenic Reserve near Clifton.

England, Northumberland, Harthope Valley. The Cheviot Hills and the Northumberland National Park viewed from Housey Crags above the Harthope Valley.

Spain, Catalonia, Pyrenees, Serra De Moixeró. Typical Pyrenees mountain scene of alpine meadow and mountains in the Serra De Moixeró.

Spain, Catalonia, Pyrenees, Cadí-Moixeró Natural Park. The Pyrenees mountain range in the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Cadí-Moixeró Natural Park. The Pyrenees mountain range in the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Bagà. The Pyrenees mountain range in the Cadí-Moixeró Natural Park near Bagà.

Spain, Catalonia, Pyrenees, Pedraforca. Saldes in the shadow of the Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Cadí-Moixeró Natural Park. Early morning light highlights the geological features of the Cadí-Moixeró Natural Park near Pedraforca Mountain.

Spain, Catalonia, Pyrenees, Cadí-Moixeró Natural Park. Early morning light highlights the geological features of the Cadí-Moixeró Natural Park near Pedraforca Mountain.

Spain, Catalonia, Pyrenees, Pedraforca. Soft morning light illuminates the village of Saldes at the foothills of the Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Cadí-Moixeró Natural Park. Early morning light highlights the geological features of the Cadí-Moixeró Natural Park near Pedraforca Mountain.

Spain, Catalonia, Pyrenees, Pedraforca. The Pedraforca Mountain in the heart of the Cadí-Moixeró Natural Park.

Spain, Catalonia, Pyrenees, Gósol. A storm brews above the village of Gosol in the Catalonian Pyrenees mountains.

Spain, Catalonia, Pyrenees, Gósol. Houses in the village of Gosol in the Catalonian Pyrenees mountains.

New Zealand, Canterbury, Castle Hill. Imposing array of limestone boulders on Castle Hill overlooking the Canterbury Plains.

New Zealand, Canterbury, Castle Hill. Imposing array of limestone boulders on Castle Hill overlooking the Canterbury Plains.

New Zealand, Canterbury, Castle Hill. Imposing array of limestone boulders on Castle Hill overlooking the Canterbury Plains.

Argentina, Patagonia, Los Glaciares National Park. Signs of uplift in the foothills of the Fitz Roy range, by the Poincenot campsite.