The wide range of rock types used for gravestones means that cemeteries can be geological treasuretroves. For geologists - whether amateur, student or professional - almost any urban cemetery provides a valuable opportunity to carry out scientific field work at leisure, right on the doorstep, and at no cost. The geological trails in the six Oxford cemeteries described here highlight the wide variety of rock types and geological features that can be seen in the graveyards throughout Britain - and provide an introduction to geology that anyone can enjoy.