Bartolomé is a small volcanic island with a wooden staircase to the top. The guide had us on it at seven to beat both the heat and the other boats. The climb takes twenty minutes past old lava and plants that grow on almost nothing.
From the summit you get Pinnacle Rock and the two bays on either side, one green, one pale blue. A penguin was on the rocks below, well north of where I expected to see one.
We were back on the boat by nine. The light had already gone hard by then.