Triangle shaped Lions Gate, the entrance to the ancient citadel, Mycenae, UNESCO World Heritage Site, Peloponnese, Greece, Europe

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

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

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

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