Cave Entrance

Sea Kayak Silhouette at Mission Tidal Cave Entrance in near Mission, San Francisco

Sea Kayak Silhouette at Mission Tidal Cave Entrance

OM System OM-5 · near Mission, San Francisco

 Sea Kayak at Tidal Cave Entrance Late Autumn in along a switchback approach near Bacvice, Split

Sea Kayak at Tidal Cave Entrance Late Autumn

Sony a7R II · along a switchback approach near Bacvice, Split

 First Light on Cave Stalactites Near Carrollton in near Carrollton

First Light on Cave Stalactites Near Carrollton

Nikon D7100 · near Carrollton

 Bat Colony Emerging from Cave at Sunset in beside a tidal inlet near Chinatown, San Francisco

Bat Colony Emerging from Cave at Sunset

Canon T90 · beside a tidal inlet near Chinatown, San Francisco

 Blue Light Glacier Cave Near Sapporo in near Sapporo

Blue Light Glacier Cave Near Sapporo

Sony a6400 · near Sapporo

 Subterranean River Dawn Mandi Bahauddin Monsoon in along a wave-cut shoreline near Mandi Bahauddin

Subterranean River Dawn Mandi Bahauddin Monsoon

Canon EOS 7D Mark II · along a wave-cut shoreline near Mandi Bahauddin

 Nicaraguan Underground River at Dusk in in Nicaragua

Nicaraguan Underground River at Dusk

Canon T90 · in Nicaragua

 Golden Hour Silhouette Giant Crystal Cave Near Los Teques in near Los Teques

Golden Hour Silhouette Giant Crystal Cave Near Los Teques

Pentax ME Super · near Los Teques

 Blue Ice Cave Glowing on Canadian Shore in along a wave-cut shoreline in Canada

Blue Ice Cave Glowing on Canadian Shore

Sony Xperia 1 V · along a wave-cut shoreline in Canada