Lakes play a significant role in greenhouse gas (GHG) emissions, acting as either sources or sinks for climate-relevant gases and serving as important regulators of global carbon cycling. However, the combined pressures of global climate change and local anthropogenic stressors are driving rapid changes in these ecosystems, creating complex challenges that cascade through food webs and lake functioning, and ultimately influencing their capacity to emit or absorb GHGs. However, most estimates of lake GHG concentrations rely on a limited number of sampling points, often neglecting spatial heterogeneity. Variability across nearshore and offshore zones, as well as between inflows and outflows, remains especially underexplored. This lack of spatial resolution constrains our understanding of lake processes and their contributions to regional and global biogeochemical cycles. To address this gap, we investigated fine-scale spatial variability in surface water concentrations of methane (CH4) and carbon dioxide (CO2), along with key water-quality parameters, across three morphologically and trophically distinct lakes in Northern Italy (Maggiore, Iseo, and Alserio). We used the Fast Limnological Automated Measurements (FLAMe) system for high-frequency, spatially explicit, real-time data collection. To complement these surface measurements, we also collected vertical water-column profiles and compared them with data from long-term monitoring programs. Preliminary results revealed pronounced spatial heterogeneity in water quality and GHG concentrations. Clear gradients emerged between littoral and pelagic zones, with inflowing rivers strongly shaping water chemistry and gas dynamics. Littoral areas, often underrepresented in traditional lake studies, emerged as hotspots of both variability and GHG production, underscoring their ecological and biogeochemical importance. Furthermore, our findings highlight the need to pay greater attention to small, shallow lakes: despite their modest surface area, their abundance and active metabolism make them significant contributors to global carbon cycling.