There are a lot of places, but most often leaks are caused by a bad valve cover gasket. It might be just on the firewall side of the engine.
Knowing the YEAR would help answer your question a little better. Check these things : Water pump, INTAKE MANIFOLD GASKET, And there could be a heater hose fitting screewed into the front left corner of the intake that could be leaking. That's you standing in front of the engine looking at it. There is also a Freeze plug that is hidden on the left front side of the timing cover that could be leaking.
Are you sure you have a leak? Most of the time when using the air conditioner, your car will appear to be leaking water or dripping underneath the vehicle, towards the front.
Rear main engine seal or front transmission seals
Water dripping on the front of a portable air conditioner could mean that the air filter needs to be changed. Your evaporator coil may also be dirty.
If oil is leaking from the riverside of a 1998 Honda Accord the vehicle may be experiencing a front seal leak. The main front seal is located on the crankshaft of the engine.
from the water pump tell tale hole
Valve cover? Engine seal/ front or rear?
The front seal is out on your pump. Replace the seal
Radiator or hose but probably water pump
What color fluid?
because it may have a leak so yeah a small leak
Without seeing or pressure testing the system my most educated guess would be that the intake manifold is leaking.