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The famous Mangapohue Natural Bridge near Waitomo Caves on New Zealand's north island.

Unrecognizable persons going down the steps 100 m in underground volcanic tunel. Colorful volcanic rocks in the Algar do Carvao cave, at Terceira island, Azores

CLEARWATER Cave - Show cave tour at Gunung Mulu National Park

$This is the Shishan Volcanic Group National Geopark in Haikou, Hainan province. The highest point is one of the world's fully preserved dead craters, which is covered with dense vegetation.\nIt belongs to the volcanic-basalt hilly landform, with an average elevation of 40-60 meters, the overall slope is relatively gentle, and the altitude is 222.8 meters. It belongs to the tropical island monsoon climate zone, and the tropical ecological landscape is developed on the basis of volcanic lava and tuff layers.\nNow, it is a place for leisure and tourism.$

Tunnel made with wicker Road circuit for children in a public park

DoC intentions book at the start of the Kaituna Track, Kahurangi National Park, Tasman region, south island, Aotearoa / New Zealand.

Camuy River Caverns National Park is one of the largest cave systems in the world and the largest in the Western Hemisphere.

Amazing New Zealand Tourist attraction glowworm luminous worms in caves. High ISO Photo..

Horizontal landscape photo of spectacular underground limestone rock formations, lit up by lights, inside the Wombeyan Caves in a reserve in the countryside near Goulburn, NSW.

The entrance of Stalactite and stalagmite in Waitomo cave , North Island of New Zealand

The beautiful colors of stalagtites and stalagmites in Lake Cave, Western Australia.

Entryway to the Nahuku - Thurston Lava Tube, at Hawaii Volcanoes national park.

Garden Arch on a Bridge in Montreal Botanical Gardens

Wooden walkway leading into a narrow cave passage, next to a vertical rock wall at Pokljuka gorge in Gorenjska, Slovenia

[Background material] Wooden roof with entwined plants.

The magical underground environment from picturesque different minerals as limonite dripstones creating stalagmites, stalactites, and stalactite spaghetti.

View from inside of Algar do Carvão cave, inside an extinct volcano, in Terceira island , Azores archipelago.

Free Images: "bestof:Woven timber canopy at Waitomo cave entrance.jpg Woven timber canopy at Waitomo Glowworm Caves visitor centre and entrance Own 2012-10-13 Pseudopanax wikipedia"

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Woven timber canopy at Waitomo cave entrance.jpg

Limestone cave walls in Waitomo Glowworm Cave.jpg

Spiral ramp cave entrance in Ruakuri Cave.jpg

View out towards Metro Cave Te Ananui Cave entrance.jpg

Stalactites at Rawhiti Cave entrance.jpg

Stalactites and young Nikau palm at Rawhiti Cave entrance.jpg

Stalactites above walkway in Ruakuri Cave.jpg

Stalactite with cave popcorn in Ruakuri Cave.jpg

Layers in cave walls in Ruakuri Cave.jpg

Stalactites, stalagmites and columns in Ruakuri Cave.jpg

Stalactites and straws in Ruakuri Cave 1.jpg

Stalactites and straws in Ruakuri Cave 2.jpg

Cave walls above walkway in Aranui Cave.jpg

Stalactites above walkway in Aranui Cave.jpg

Stalactites and straws in Aranui Cave.jpg

Stalactites on cave wall in Aranui Cave.jpg

View down valley from Metro Cave Te Ananui Cave entrance.jpg

Columns and straws with cave popcorn in Ruakuri Cave.jpg

Stalactites with cave popcorn on cave wall in Aranui Cave.jpg

Columns and stalagmites in water in Aranui Cave.jpg

Stalactites, stalagmites and columns in Fairy Cave in Aranui Cave.jpg

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