Show Us Geology On Stamps. Geologic Formations, Etc

United Nations 2024 World Heritage Sites - Jeju Volcanic Island and Lava Tubes
Seongsan Ilchulbone, also called Sunrise Peak, is a 182 meters high tuff cone located on eastern Jeju Island, South Korea. The steep sided cone was formed 6700 years ago by explosive hydrovolcanic eruption upon a shallow seabed.

Indonesia 2023 Tourism - Sawu Island
Kelabba Madja is located on the southern coast of Sawu Island in the Savu Sea Basin, a part of a non-volcanic arc on the southern edge of the Eurasian Plate. Jurassic and Cretaceous sedimentary rock formations in the area feature spectacular erosion landform of canyons and gullies with colorful cliff walls, while columns and pyramids are capped by hard rocks.

CHILE 1979

When this stamp was issued commemorating 50 years of the city of Coyhaique, they wanted to show an image of Cerro Castillo, a mount wich is located near the city


But the designer the stamp mistakenly used an image of Mount Lavaredo (in Italy).
How many guys reviewed this work before printed and none of them noticed ?
This is the real Cerro Castillo :

ECUADOR 1957
Rumichaca Grotto
It is a rock formation through which water filters from the mountain and over the decades a scene has formed with stalactites and stalagmites, among which birds and bats nest.