One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The culture that built these Tanzanian ruins displayed advanced knowledge of irrigation technology before mysteriously disappearing.

An exquisite and eclectic selection of African masks stands out within a massive woodcarving marketplace.

Human ancestor’s 3.6 million year-old footprints.

The largest game reserve in Africa is home to thousands of species but refuses to house humans.

This rare volcano spews the strangest and (literally) coolest lava in the world.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

Stay in your own little bubble.

Stunning ruins of what was once the center of one of the greatest empires in East Africa.

A salty red wasteland in Tanzania is a breeding spot for endangered flamingos.

A tiny, forgotten park of surrealist sculptures in Angouleme.

15,000 year old bison sculptures.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

This large sculpture of white plates and forms is actually a huge sound amplifier.

Swiss vineyards in a UNESCO heritage site.

Artworks by loners, prisoners and the criminally insane.

The chefs at El Diablo use heat generated by an active volcano to cook the food.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

Thousands of years of crashing waves gave this mushroom-shaped rock its svelte figure.

A reconstructed farm shows what life was like in Norway 1,500 years ago.