Migration is not only a movement of people but also of knowledge systems, building practices, and environmental sensibilities. This chapter explores how vernacular architectural forms, shaped by specific climates, travel with migrant communities and transform when recontextualized. It examines architectural features such as courtyards, wind catchers, mashrabiyas, and adobe construction, tracing their origins, environmental performance in native climates, and the adaptations (or losses) they undergo when displaced. Drawing on examples from North Africa, the Middle East, and Southeast Asia, the chapter follows the trajectory of these elements into European, North American, and Gulf contexts. Their reapplication, whether in migrant housing, eco-experiments, or commercial projects, often reveals tensions between cultural memory and environmental mismatch. Though they may lose climatic relevance, these strategies retain symbolic value and inspire hybrid designs across contexts. To understand this evolution, the chapter categorizes the architectural strategies into three dimensions: morphology, elements, and materials. It analyzes how their environmental functions are challenged or retained and how their cultural meanings shift or persist. Through comparative case studies and climatic analysis, it reveals how adaptation, reinterpretation, or symbolic use of vernacular forms reflects the broader negotiations between identity, environment, and design in a transnational world. The built environment thus becomes a space where heritage and innovation converge, particularly in the age of global migration.