Take Tràng An Route 2 through Hang Tối and Hang Sáng to Đền Trần
Cave tunnels to a temple with no road
The other circuit from the same wharf threads the Dark Cave and the Bright Cave and ends at a temple inside a flooded karst valley, reached on foot up steps from the landing. Confusing it with Route 1 is the commonest mistake in write-ups.