Casa Mila, Barcelona, Catalonia, Spain, Europe

Mesa Arch, Canyonlands National Park, Utah, United States of America, North America

Tavira, an ancient Moorish town that has retained its unique character and heritage, Tavira, Algarve, Portugal, Europe

Aerial of an ice arch in the Nuuk Icefjord, Western Greenland, Denmark, Polar Regions

A dusk view of the unique 18th century Pulteney Bridge spanning the River Avon, in the heart of Bath, UNESCO World Heritage Site, Somerset, England, United Kingdom, Europe

The unique 18th century Pulteney Bridge spanning the River Avon, in the heart of Bath, UNESCO World Heritage Site, Somerset, England, United Kingdom, Europe

The unique 18th century Pulteney Bridge spanning the River Avon, in the heart of Bath, UNESCO World Heritage Site, Somerset, England, United Kingdom, Europe

Unique rock arch, Ennedi Plateau, UNESCO World Heritage Site, Ennedi region, Chad, Africa

Ephemeral arch, valley of fire state park, nevada, usa, nord amerika

Antelope canyon, sandstone slot canyon formed by wind and water, lower antelope canyon, page, arizona, usa

Ephemeral arch, valley of fire state park, nevada, usa, north america

Ephemeral arch, valley of fire state park, nevada, usa, north america

Roman remains at the Roman town of Conimbriga in Portugal

Rakotzbrucke or Teufelsbrucke, bridge in Kromlauer Park, Kromlau, Saxony, Germany, Europe

Uniquely decorated door with an arch and a design on the facade of the house, Casablanca morocco

Pipe In A Unique Shape In A Grassy Area, Mckittrick, California, United State of America

Moab, Utah, United States Of America; Delicate Arch In Arches National Park