The entrance to ""Diamond Cave.
Lighting displays in this famous Guilin Cave are not as muted as some but still beautiful in their own way.
Limestone tower off Poda Island
Near Kansas Post Rock Country, trees are too scarce to be used on fencing.
a photo of an islet made of limestone, hundred islands
the pumpboat that took us the the islands in the background
In caves at the Leeuwin Naturaliste NP
Limestone pinnacles in Mulu National Park, Sarawak, Malaysian Borneo
This famous and very unique limestone formation in Mulu National Park in Sarawak, East Makaysia resembles a past USA president
El Nido, Palawan, Philippines