Major efforts were made during the last decade to identify best candidates of Massive Young Stars (MYSOs) by building systematic databases. These databases were built mainly from single dish observations (12"-50" spatial resolution) in the millimeter regime and utilized data from IRAS and MSX surveys. I shall present new results from near infrared (1" spatial resolution) studies of these candidate massive young stars, and examples of interferometric observations using molecular lines. The results include discovery of huge (10000-50000 AU) disk and ring type structures that are visible in H_2 emission, and similar rotating envelopes that appear in molecular line observations. A 2MASS study of 250 candidate MYSOs revealed embedded clusters associated with at least 25% of the targets. These embedded clusters are likely to be in some of the "dynamically least relaxed" states known and have opened up an opportunities to study some issues of star formation in groups and clusters. The morphology of these embedded clusters indicate the relative importance of turbulence and gravity in cluster formation.