Interior view of the triangular repeating ceiling in The Arctic Cathedral, Tromso, Norway, Scandinavia, Europe

Monument to Overseas Combatants, of the Colonial Wars, Fortress of Good Success (Forte do Bom Sucesso), Belem, Lisbon, Portugal, Europe

Monument to Overseas Combatants, of the Colonial Wars, Fortress of Good Success (Forte do Bom Sucesso), Belem, Lisbon, Portugal, Europe

Saline plains, a salt mine in Bonaire, ABC Islands, Netherlands Antilles, Caribbean, Central America

Parish church of Hammerfest, Finnmark, Arctic, Norway, Scandinavia, Europe

Arctic Cathedral, Tromso, Norway, Scandinavia, Europe

Exterior view of The Arctic Cathedral, Tromso, Norway, Scandinavia, Europe

The Arctic Cathedral (Tromsdalen Church) (Tromsoysund Church), Tromso, Norway, Scandinavia, Europe

The Arctic Cathedral (Tromsdalen Church) (Tromsoysund Church), Tromso, Norway, Scandinavia, Europe

Triangular Building at night the corner of Alexander and Powell Street, Gastown, Vancouver, British Columbia, Canada, North America

A triangular lunette at the Castillo del Morro, a fortess at the entrance to the Bay of Santiago, UNESCO World Heritage Site, 10 km southwest of Santiago de Cuba, Cuba, West Indies, Central America

Close-up of a stone wall with intricate carvings. Triangular, arched windows with ornate columns and a sundial at the center in York, North Yorkshire, UK.

View of the Flatiron Building, a triangular steel-framed landmark at 175 Fifth Avenue in the Flatiron District neighborhood, Manhattan, New York City, United States of America, North America

Porta Nuova district, Milan, Lombardy, Italy, Europe

Three hoodoos in a triangular formation in Devil's Playground called the Unholy Trinity, Petrified Forest National Park, Arizona, United States of America, North America

Three hoodoos in a triangular formation in Devil's Playground called the Unholy Trinity, Petrified Forest National Park, Arizona, United States of America, North America

Three hoodoos in a triangular formation in Devil's Playground called the Unholy Trinity, Petrified Forest National Park, Arizona, United States of America, North America

Flatiron Building, Midtown, Manhattan, New York, United States of America, North America

Traditional house with steep, triangular-shaped thatched roof, Santana, Madeira, Portugal, Atlantic, Europe

Traditional houses with steep, triangular-shaped thatched roofs, Santana, Madeira, Portugal, Atlantic, Europe

Traditional triangular thatched A-framed Palheiro Houses, Santana, Madeira, Portugal, Atlantic, Europe

Traditional triangular thatched A-framed Palheiro Houses, Santana, Madeira, Portugal, Atlantic, Europe

Pedestrians In Road Ahead warning sign by the road in Oxfordshire, United Kingdom

Traditional triangular thatched A-framed Palheiro Houses, Santana, Madeira, Portugal, Atlantic, Europe

Car passes Accompanied horses or ponies warning sign by roadside, Dorset, UK

The Kulturforum housing the Gemaldegalerie, Kupferstichkabinett, Kunstbibliothek and Kunstgewerbemuseum, Berlin, Germany, Europe

The National Gallery of Art, Washington DC, United States of America

Harbour porpoise (Phocoena phocoena) with tail visible through the water and characteristic triangular dorsal fin just leaving the surface. Hebrides, Scotland

Harbour porpoise (Phocoena phocoena) with small blow hole and triangular dorsal fin visible above the surface. Hebrides, Scotland

Harbour porpoise (Phocoena phocoena) showing characteristic pigmentation on its flanks and triangular dorsal fin. Hebrides, Scotland

Julia Petrik Russian freediver. White Sea, Russia

Harbour porpoise (Phocoena phocoena) with tail and triangular dorsal fin visible. Hebrides, Scotland

Harbour porpoise (Phocoena phocoena) showing characteristic pigmentation on its flanks and triangular dorsal fin. Hebrides, Scotland

Harbour porpoise (Phocoena phocoena) showing characteristic triangular dorsal fin. Hebrides, Scotland

This is the nebula rich region in the constellation of Monoceros the Unicorn with the dark Cone Nebula (left of centre) and the small V-shaped and bright Hubble's Variable Nebula at bottom, a reflection nebula that varies in form and brightness. Above the Cone Nebula is the triangular Christmas Tree Cluster, NGC 2264, here upside down as the bright blue star 15 Mon is the base of the tree. The large region of nebulosity is Sharpless 2-273. The V-shaped dark nebula above centre is LDN 1603.

Grave of President Sadat and the Memorial for the unknown soldier under blus sky, Heliopolis district, Cairo, Egypt, Africa

Schloss Buerresheim, Baroque garden, Mayen, Vulkaneifel, Eifel, Rhineland-Palatinate, Germany, Europe

aerial photo of the interim nuclear waste depot at Gorleben in Lower Saxony, Germany

Modern architecture, Potsdamer Platz, Berlin

Harbour in front of modern triangular Christian church, Ishavskatedralen (Arctic Cathedral aka Tromsdalen Church), Tromsoe, Norway

North Tower, Wewelsburg, triangular castle, former Nazi cult and terror center of the ss, today historical museum, hostel, Bueren, Paderborn, North Rhine-Westphalia, Germany, Europe

Sign with German inscription Kein Eingang, no entrance, Wewelsburg, triangular castle, former Nazi cult and terror center of the ss, today historical museum, hostel, Bueren, Paderborn, North Rhine-Westphalia, Germany, Europe

Towers, Wewelsburg, triangular castle, former Nazi cult and terror center of the ss, today historical museum, hostel, Bueren, Paderborn, North Rhine-Westphalia, Germany, Europe

The symbol of Sicily, a girl's head surrounded by snakes and small wings with three running angled legs, sun wheel, on a wall, Taormina, Messina, Sicily, Italy, Europe

Overhead view of a plate with prepared spaghetti with vegetable sauce and basil. View from above at food on kitchen tabletop

Closeup view of hand grating parmesan on a hand grater over a plate of pasta in the kitchen

Casas de Colmo in Santana - Traditional Madeira styled thatched houses - Madeira

Casa de Colmo in Santana - Traditional Madeira styled thatched house - Madeira

Casas de Colmo in Santana - Traditional Madeira styled thatched houses - Madeira

Glass front, Deichtor office building, Hamburg, Germany

Casa de Colmo in Santana - Traditional Madeira styled thatched house - Madeira

Warning sign warning of camels in desert, Essendilene, Algeria, Africa

Front view of a house, Bermuda

Looking Down A Spiral Staircase, Andalusia, Spain

Back end of tractor carrying a load of harvested cornstalks (Zea Mays) on a highway driving through the countryside; Yarrow, British Columbia, Canada

Two of the primary Pyramids of Giza, sunlit with a golden hue, the Great Pyramid (Khufu) under a dark, cloudy sky, Giza, Egypt

Camels with colorful saddles waiting for tourists with the Great Pyramid of Giza in the Distance, Giza, Cairo, Egypt

Close-up view of the pyramidal spire of St Mark's Campanile behind the decorative rooftop edging of Doge's Palace in the Piazza San Marco in Venice against a blue sky, Venice, Veneto, Italy

Flatiron Building, New York City, New York, United States Of America

Desert landscape with triangular rock formation and pinnacles in sunlight, Howtah, Saudi Arabia

Typical roof in Bermuda

Scuba diver exit the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Person who provide contact with the divers inside the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia

Surface tender seen through the maina (sawed entry hole) to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia