Landslide is defined as the part of the slope on which, due to stability disturbances, landslides and displacements of soil or rock have occurred from an unstable position to a stable one. The main cause of sliding is considered to be water (saturation of pores in the soil with water). Landslides are a very serious and current problem today. Therefore, adequate field research is of great importance for determining the cause of landslides and remediation solution. This paper describes, presents and interprets the results of field research of landslides at two locations, in the area of Samarica and Petrovsko. Geoelectric tomography, multichannel analysis of surface waves and seismic refraction were performed from geophysical methods. Geotechnical investigations included static sounding with a conical penetrometer and dilatometer and dynamic sounding with a heavy and light impact probe. The analysis showed excellent complementarity and overlap of the results of geophysical and geotechnical methods. Although exploratory drilling is the most direct research method, it is very expensive and time consuming, and only point data are obtained. The results of exploratory drilling in the area of the Samarica landslide show a good correlation with the results of other geophysical and geotechnical methods. Field exploration works without the use of sounding drilling in the area of the landslide Petrovsko proved to be very successful in detecting the depth of the sliding surface. After the research, remedial solutions were proposed. The success of the remediation solution is checked by stability analysis according to Bishop, where the safety factor defines the stability of the slope. In the case of a stable slope, the safety factor must be greater than 1.