Historic architecture in Edinburgh with the Hub and spires against a cloudy sky, showcasing Scotland's capital city's charm, Edinburgh, Scotland, United Kingdom, Europe

Interior of airship at DOX art hub, Holesovice, Prague, Bohemia, Czech Republic (Czechia), Europe

Exterior of airship at DOX art hub, Holesovice, Prague, Bohemia, Czech Republic (Czechia), Europe

Interior of Els Quatre Gats, an art nouveau cafe opened in 1896 and hub for the Modernisme movement, Barcelona, Catalonia, Spain, Europe

Cano's Castle, built by Donald "Cano" Espinoza, a Native American and Vietnam veteran who built the Christian-themed structure from beer cans, hub caps, and other scrap materials, in thanks for his life being spared in Vietnam, Antonito, Colorado, USA

Scenic colonial streets and architecture of San Jose del Cabo in historic city center, hub for culture and numerous art galleries