Abstract: The detectors designed for the search of new particles at LEP in 1980's were optimized for precise measurements on muons of energies around several tens of GeV. Due to the very large size of these muon spectrometers and their location at moderate depths underground, it became possible to use them for various studies on cosmic ray muons. In late 1990's additional instrumentation was installed for the L3 precision muon detector, for its independent running with a cosmic ray trigger. I propose to present some details of observations with the L3 and other detectors at LEP during the last few years before the LEP shutdown and discuss a few results obtained recently from these studies.