1998 Honda Accord coolant in engine

Coolant can not get into places in the engine where it doesn't belong from an external leak. If it could, you'd have a problem every time you drove in the rain. What you're seeing is water dripping from a drain hole in the muffler. That is normal. In fact, you had better be seeing that. Carbon dioxide and water vapor are the byproducts of a properly-working catalytic converter. Most manufacturers put a drain hole in the muffler if they want it to last longer and reduce the tendency to rust out. That water doesn't cause a rusting problem if the car is driven at highway speeds long enough to burn that moisture off. Mufflers tend to corrode a lot sooner on cars used for mostly short-trip driving because the exhaust system doesn't get hot enough to vaporize that water.