Top of the trail leading down to the Thurston Lava Tube

(March 11, 2011)

Standard Size or Large Size

Entrance to the Thurston Lava Tube

(March 11, 2011)

Standard Size or Large Size

Thurston Lava Tube, paved and lighted by the park service

(March 11, 2011)

Standard Size or Large Size

Inside Thurston Lava Tube cave

(March 11, 2011)

Standard Size or Large Size

Tree ferns near the far end of Thurston Lava Tube

(March 11, 2011)

Standard Size or Large Size