Callao Cave

An enormous cave system with beautiful speleothems. Here have been found the earliest human remains in the Philippines, at least 67 thousand years old. These remnants belong to an extinct species of humans – Homo luzonensis.

Gainer Springs

Some of the most pristine of the large springs of Florida are Gainer Springs. If one wants to admire this wonder of nature: take a canoe and…

Menara – the world’s tallest tropical tree, Danum Valley

The tallest known tree in the tropics and the tallest flowering plant in the world, a 100.8 m tall Shorea faguetiana.

Ouzoud Falls

110 m tall, visually impressive and interesting waterfall with several cascades. Stream continues into canyon that is almost 600 m deep.

Mount Nyiragongo – volcano with lava lake

One of the few volcanos in the world with a nearly permanent lava lake in it. Height of the mountain – 3,470 m. Depth of lava lake has reached up to 600 m. Eruptions produce very fluid lava of rare type. The speed of lava flows here can reach 100 km/h and the volcano is very steep.

Dagejia Geysers

Possibly one of the largest geyser fields in the world reported having some 100 geysers. Dagejia Geyser spouts up to 20 m high and is the largest geyser in Tibet.

Sar-i Sang lapis lazuli mines

For several millenia here is mined the best lapis lazuli in the world.

Troy Spring

One of the most beautiful great springs in Florida. Troy Spring contains remnants of a steamship that was sunken in 1863, during the Civil War.

Augrabies Falls

Here the Orange River falls 56 meters into a deep gorge. During a flood, this becomes one of the most powerful falls in world.

Erta Ale

One of the most active volcanos in the world, with a constant lava lake (sometimes two lakes) in the crater, known since 1906. None of the other known lava lakes in the world have such a long lifetime.