This gallery contains a selection of examples of the plots Altair can create. Some may seem fairly complicated at first glance, but they are built by combining a simple set of declarative building blocks.
Many draw upon sample datasets compiled by the Vega project. To access them yourself, install vega_datasets.
python -m pip install vega_datasets
If you can’t find the plots you are looking for here, make sure to check out the Related Projects section, which has links to packages for making e.g. network diagrams and animations.