Cacti and succulents come in a variety of shapes and sizes. Some of the tiny ones are best-suited to miniature garden arrangements, while giants such as the saguaro would be too big to be displayed suitably in some front yards! I use the terminology "cacti and succulents" here merely out of deference to popular convention. All cacti are, in fact, considered to be succulents (but not all succulents are cacti). View my pictures of cacti and succulents for some examples.
I include photos of the succulents known as agave and yucca in this gallery. Although often thought of in connection with cacti, agave and yucca belong to a group of plants distinct from cacti.