Most open world expansions?

Fire and Ice definitely fits this description of open world and generally free exploration, but I’ve beaten that many times already.
HoL 1 and 2 have many paths blocked by trees or other impassable objects, which makes exploration tedious to me.
Are there any other expansions that feature a mostly un-obstructed world that is conducive to exploring?
HoL 1 and 2 have many paths blocked by trees or other impassable objects, which makes exploration tedious to me.
Are there any other expansions that feature a mostly un-obstructed world that is conducive to exploring?