The content folders of AutoCAD Civil 3D contain a large number of predefined multi-view blocks for a number of design purposes. These contain multi-view blocks of building footprints, landscape symbols, annotation symbols, site-related symbols, and other useful elements.
You can access these multi-view blocks from the AutoCAD Civil 3D MV Blocks Tool Palette. You can also use DesignCenter™ to insert the blocks.
Predefined multi-view blocks are located in the following folder by default: