Prominent features of many gothic novels are mystery, doom, decay, old buildings with ghosts in them, madness, hereditary curses and so on.
Examples:
In England, the Gothic novel as a genre had largely played itself out by 1840. It left a lasting legacy, however, in works such as Mary Shelley's Frankenstein and the works of Edgar Allan Poe. From these, the Gothic genre strictly considered gave way to modern horror fiction.