The five crates are located outside the stores and shops and on the floor of the town. They look like small wooden crates and are not hidden too hard. Walk all around the town as well as up stairs...
The weight of the crate is acting downward on the ground and the ground is exerting a force equal to the weight of the crate upward on the crate.
The moon has craters because since it does not have an atmosphere like the Earth does, it is prone to meteors which cause craters.