High angular resolution observations of mm-bright protoplanetary disks are
showing a broad variety of substructures, both in NIR scattered light and
in mm continuum emission. In this talk, I will focus on the complementarity
of (sub-)mm, NIR imaging and optical photometric observations of disks
showing large cavities in the dust distribution, and thus prime targets to
observe giant planets interacting with their natal environment. In particular,
I will show and discuss new ALMA and VLT/SPHERE data showing substructures
in disks in their density and velocity structure that are suggestive of
planet (or binary)-disk interactions and on-going planet-formation. I will
conclude showing how spatially resolved line surveys in these objects can link
the secular dynamical properties of the systems with their chemical inventory,
which is a key ingredient for the long term goal of connecting mature
exoplanetary atmospheric abundances to the planet formation process.