here be dragons

Meaning

A fanciful notation, commonly attributed to historical maps, held to indicate either the belief that unknown dangers exist in a certain location on the map, or that actual dragons can be found there.

By extension, used to indicate that which is unknown or uncertain, particularly if it seems to carry some type of risk.

Source: en.wiktionary.org

Synonyms

here be monsters there be dragons

Examples

Here be dragons to be slain, here be rich rewards to gain; If we perish in the seeking, why, how small a thing is death! Dorothy L. Sayers

Monsters Beware Here Be Dragons. Laurell K. Hamilton

Words in the phrase

here be dragons

Close letter words and terms

here and there here are here are a few points to note here be monsters here below here document