Retreat Centers are places operated with varying levels of material infrastructure, but all alike in serving as a place for truth seekers, pilgrims, worshipers, meditators, e.g. anyone devoted to the adventure of a spiritual life. At retreat centers, the time and space available is usually spent in contemplation, and not infrequently punctuated with celebratory music, dancing, and singing. There are as many such centers as varied as the persons who visit. With the advent of the Internet, there are available online directories for persons looking for a place near them, wherever in the world they may be. Just a few are listed below.