Brewarrina fish traps

Impressive and complex system of stone settings serving as a trap for fish. It is possible that these structures have existed here for some 40 000 years that would make this structure the oldest in the world.

Cheomseongdae

Ancient astronomical (astrological?) observatory, built in the 7th century AD. One of the oldest observatories in the world.

Quebrada Nova fields at Achadas da Cruz

Stone walled agricultural fields on a narrow land strip between 400 m tall cliffs and ocean.

Cabo Girão

A prominent cliff face, rising up to 589 m high directly from the ocean. Cliff is some 3 km wide. At the foot of the cliff in some places is a narrow strip of land with terraced fields – Fajãs de Cabo Girão.

Tehuacan stone snakes (tecuates)

Unusual and impressive travertine formations. These formations mark the lime deposits of ancient channels. The soil has weathered away leaving the hardened lime as enormous snakes stretching across the valley. These natural “channels” were used for the irrigation by local people before the coming of Spanish.

Querétaro aqueduct

1,280 m long aqueduct with 75 arches, average height – 23 m. Built in 1726 – 1738.

Suoi Giang tea forest (Suối Giàng)

Here grow possibly the world’s oldest tea trees that are up to 3,000 years old. In total in this forest grow more than 85,000 old tea trees. This could be one of the oldest tea plantations in the world.

Námafjall Geothermal Area

Large, colorful geothermal field with boiling mud pots, solfataras, sulfur deposits. Once important mine of sulfur for medieval Europe.

The old Persian turquoise mines near Nishapur

Ancient, more than 2000 years old mines of turquoise, considered to provide the best quality turquoise in the world. Mine is closed now.

Kashmir sapphire mines: source of the best blue sapphire

Now legendary, abandoned sapphire mines where the best sapphire in the world was mined.