Ethiopia's "smoking mountain" is in one of the hottest regions on the planet and is home to two lava lakes.

The hottest place on the planet.

It’s one of the hottest places in the world, but this canyon looks like it’s covered in snow.

The Earth's saltiest natural body of water belches toxic gas.

Crafted from ocean litter, this sculpture highlights the ills of overconsumption.

A micronation on an islet along the coast of a Portuguese island.

A lush oasis full of vibrant plants and striking geometric displays.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

This 19th-century tea factory turned hotel showcases restored machinery from the era.

This site was once the religious, cultural, and trade center of Sri Lanka.

An ancient stone fortress considered by many to be the eighth wonder of the world.

This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.

This elaborate temple was built around one of the Buddha's teeth.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

These small, triangular, colorful houses are a staple of Madeira Island.

A shrine-like museum entirely dedicated to soccer superstar Cristiano Ronaldo.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

In Lago Superiore, the largest expanse of lotus flowers outside of Asia is hard to miss.

Road signs in Namibia mark the location of one of the five major circles of latitude.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.