Zurich, Switzerland, April 20, 2026. Intense heat shimmer distorts the facade of the Opera House behind the burning Böögg bonfire at Sechseläutenplatz

afternoon, april 2026, atmosphere, bellevue, bonfire, boogg, burning, celebration, city center, city life, compression, crowd, culture, custom, destination, distortion, downtown, europe, event, fire, flags, flames, guild, heat haze, heat shimmer, high impact, historical dress, opera house, opernhaus, outdoor, sachsiluute, sechselauten, sechselautenplatz, smoke, spectators, spring festival, sunlight, swiss, swiss flag, switzerland, telephoto, tourism, tradition, traditional, traditional costumes, travel, urban, vivid, zunft, zurich,