portrait orientation
Seiryudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022
Seiryudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022 by Katsuaki Watanabe 青龍洞の柱状節理（兵庫県豊岡市赤石玄武洞公園） Member of #San'in Kaigan Geopark 山陰海岸ジオパーク
Genbudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022
Genbudo Cave with columnar joints, Genbudo Park, Akaishi, Toyooka-shi, Hyogo, 2022 by Katsuaki Watanabe 玄武洞の柱状節理（兵庫県豊岡市赤石玄武洞公園） Member of #San'in Kaigan Geopark 山陰海岸ジオパーク
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡（広島県安芸太田町）
Akadaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Akadaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 赤滝（広島県安芸太田町三段峡）
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021
Kuigankai, the sea of rocks in Kui, Kuichoyoshida, Mihara-shi, Hiroshima, 2021 by Katsuaki Watanabe 久井岩海（広島県三原市久井町吉田）
Dangyokei, Taishakukyo Gorge, Hiroshima, 2021
Dangyokei, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 断魚渓（広島県帝釈峡）
Karamon, a limestone cave, Taishakukyo Gorge, Hiroshima, 2021
Karamon, a limestone cave, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 唐門（広島県帝釈峡）
Ombashi, a naturally formed limestone bridge, Taishakukyo Gorge, Hiroshima, 2021
Ombashi, a naturally formed limestone bridge, Taishakukyo Gorge, Hiroshima, 2021 by Katsuaki Watanabe 雄橋（広島県帝釈峡）
Rhyolite in Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Rhyolite in Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段峡の流紋岩（広島県安芸太田町）
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandandaki, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 三段滝（広島県安芸太田町三段峡）
Sarutobi, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sarutobi, Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 猿飛（広島県安芸太田町三段峡）
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021
Sandankyo Gorge, Akiota-cho, Hiroshima, 2021 by Katsuaki Watanabe 猿飛と二段滝に向かう渡し舟の乗り場から見た風景（広島県安芸太田町三段峡）
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層（神奈川県横須賀市）
Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021
Volcanic ash layers and a sea cave on the Arasaki Coast, Miura Peninsula, Yokosuka-shi, Kanagawa, 2021 by Katsuaki Watanabe 三浦半島荒崎海岸の火山灰層と海食洞（神奈川県横須賀市）