Great Sphinx and Pyramids of Giza, UNESCO World Heritage Site, Giza, Cairo, Egypt, North Africa, Africa

The Great Sphinx at the Great Pyramid complex, UNESCO World Heritage Site, Giza, Egypt, North Africa, Africa

Temple of Amun, Temple complex of Karnak, UNESCO World Heritage Site, Thebes, Egypt, North Africa, Africa

The Temple of Ramesses II (The Ramesseum), UNESCO World Heritage Site, Thebes, Luxor, Egypt, North Africa, Africa

Limestone caravel shaped Padrao dos Descobrimentos (Monument to the Discoveries), Belem waterfront, Lisbon, Portugal, Europe

Seated Pharaohs, Pylon 8, Karnak Temple Complex, UNESCO World Heritage Site, Luxor, Egypt, North Africa, Africa

Great Sphinx of Giza, Pyramid of Khafre (Chephren) in the background, Giza Pyramid Complex, UNESCO World Heritage Site, Giza, Egypt, North Africa, Africa

Devil Figure in Hell, West Bay, Grand Cayman, Cayman Islands, Caribbean, Central America

Parish Church of the Assumption of the Blessed Virgin Mary, also known as Church of Saint Mary, Mosta, Malta

The Great Sphinx and Pyramid of Khafre, also known as Pyramid of Chephren, Giza, Cairo, Egypt

Great Sphinx and Great Pyramid of Giza, also known as Pyramid of Khufu and Pyramid of Cheops, Giza, Cairo, Egypt

Carved Buddha statue, Fengxian Temple, Longmen Grottoes and Caves, Luoyang, Henan Province, China, Tang Dynasty

Inside Ny Carlsberg Glyptotek, Copenhagen, Denmark, Europe

Batu Caves, limestone caves near Kuala Lumpur, Malaysia, Southeast Asia

The Great Sphinx of Giza, UNESCO World Heritage Site; Giza, Egypt

View of the Great Pyramid and Sphinx of Giza under a blue sky, Giza, Cairo, Egypt

Symbolic sculptures and karst limestone formations; Ninh Binh, Vietnam

The Great Sphinx of Giza, UNESCO World Heritage Site; Giza, Egypt

The Great Sphinx of Giza, UNESCO World Heritage Site; Giza, Egypt

The Great Sphinx of Giza, UNESCO World Heritage Site; Giza, Egypt

Sentinel, Andy Goldsworthy, 1999, Col du Defens, Alpes de haute Provence, France "The work Sentinels, which is part of the Refuge d'art project, is a journey through the Dignois region, at the foot of the Southern Alps. Such a project associates art, nature and the territory. The three Sentinels are stone cairns, one for each of the three valleys of the Haute-Provence Geological Reserve.