View over Piodao, schist medieval mountain village, Serra da Estrela, Beira Alta, Portugal, Europe

View over Piodao schist medieval mountain village, Serra da Estrela, Beira Alta, Portugal, Europe

Night photography at Schist, just before river mile 97, Grand Canyon National Park, Arizona, United States of America, North America

Slate church tower in Burano, Venice

Modern meets history: The inclined elevator of the castle of Bard, hosting the ultra modern and recently opened museo delle Alpi, Aosta valley, Italy

Amazing old village with schist houses, called Piodao in Serra da Estrela, Portugal, Europe

Hamburger Cheeseburger Fast Food Meal Menu with Fries and Cola Drink on Slate in Stuttgart, Germany, Europe

Red tomatoes in bowl on slate, fitness, cooking, vegetarian, vegan, vitamins, cultivation, healthy, close up, several, kitchen towel

Red peppers on slate, fitness, cooking, vegetarian, vegan, vitamins, growing, healthy, close up, three, kitchen

Modern meets history: The inclined elevator of the castle of Bard, hosting the ultra modern and recently opened museo delle Alpi, Aosta valley, Italy

Amazing old village with schist houses, called Piodao in Serra da Estrela, Portugal, Europe

Amazing old village with schist houses, called Piodao in Serra da Estrela, Portugal, Europe