Yellow rendering on stonework conservation project, Orford Castle, Suffolk, England, United Kingdom, Europe

Old gold mine buildings, Rodalquilar, Cabo de Gata natural park, Almeria, Spain, Europe

Close up of buttress roots of banyan tree, Polonnaruwa ancient city, North Central Province, Sri Lanka, Asia

The Roman period water storage cistern building, Apollonia Archaeological Park, Pojan, Albania, Europe

Temple of Kom Ombo, Egypt, North Africa, Africa

Clifden Castle in the rain, ruined manor house near Clifden, Connemara, County Galway, Connacht, Republic of Ireland

Views of the abandoned whaling station at Stromness Harbor on South Georgia Island, Southern Ocean

Ancient theatre at the Asclepieion of Epidaurus, UNESCO, Peloponnese, Greece

Detail of the Parthenon, a former temple dedicated to the goddess Athena, located on the Acropolis, UNESCO World Heritage Site, Athens, Greece, Europe

Isola Rossa historic tower at sunse, Sardinia, Italy, Mediterranean, Europe

Cavern Church, known as Abu Serga, Christian Coptic church, Cairo, Egypt, North Africa, Africa

Stone wall of Sacsayhuaman above Cusco in Peru, South America

View of The Urubamba Valley from Machu Picchu ruins of Inca citadel in Peru, South America

Dry-stone walls of Machu Picchu ruins of Inca citadel in Peru, South America

Stone walls of Sacsayhuaman above Cusco in Peru, South America

Dry-stone walls of Machu Picchu ruins of Inca citadel in Peru, South America

Machu Picchu ruins of Inca citadel in Peru, South America