Simplify the following text for a Grade 8 native English-speaking person.
Original: Many Celtic Reconstructionists maintain altars and shrines to their patron spirits and deities , often choosing to place them at outdoor , natural locations such as wells , streams , and special trees .
Simplified: Many CRs have altars and shrines to the spirits and deities they believe in . They may place these altars at outdoor , natural locations such as wells , streams , and special trees .