While exploring caves underground or climbing during your adventure travel vacation, never climb a rope hand-over-hand. Simple physics shows that it is physically impossible to climb out of a deep pit hand-over-hand. You will get tired and what will you do then?
If you must do pits, take the time to learn vertical techniques from people who know what they are doing and invest in some sound caving equipment.
Many caving gear establishments periodically schedule vertical training and practice sessions. These sessions give you the opportunity to try out vertical gear to decide what system works best for your physical and financial condition. It is really important to prepare for your caving vacation with regular conditioning exercise. Adventure travel is a great thing, but you need to be prepared and physically fit.