Geology
Mauna Kea: Height, Volcano, Observatories & How to Visit
Mauna Kea rises 13,803 feet (4,207 m) above sea level, but about 33,480–33,500 feet (10,205–10,210 m) from a selected submarine base. It is taller…
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Lakes
Tanganyika: Second Deepest Lake in the World
Imagine plunging over 4,800 feet beneath the surface of a freshwater expanse so vast it spans four countries. Lake Tanganyika holds this spectacular record…
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Iran · History
Naqsh-e Rustam, Iran: The Ancient Achaemenid Necropolis & Sassanid Rock Reliefs
Drive or taxi north on Road 65 for ~30 km; follow signs toward Persepolis, then Marvdasht–Estakhr.
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Islands
Atolls & Coral Formation: Mapping Nature’s Ringed Islands
What is an atoll? An atoll is a ring-shaped coral reef, island, or series of islets encircling a central lagoon, formed as volcanic islands…
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Geology
Which Country Has the Most Volcanoes?
Source: Smithsonian Global Volcanism Program (GVP) — Country counts, data current to 19 Sep 2025.
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