An ancient impact crater on the outskirts of Pretoria.

South Africa's postal service began with a letter left in a boot beneath this tree.

Local lore says a serpent-like beast lurks in the deep basin below the falls.

A safari-themed castle in the South African bush with the largest maze in the southern hemisphere.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

Largest cave system in Africa.

The tallest residential building in Africa is an unsettling Brutalist monolith.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

A South African bar inside a hollowed out 6,000-year-old Baobab.

Brisbane's manmade urban beach has enough water to fill five Olympic-sized swimming pools.

Final resting place for hundreds of prisoners of war.

The ruins of a once prosperous power station have become a mouldering seaside gem.

The once-dying town of Sheffield, Tasmania has reinvented itself as a village of painted wonders.

An unphotographable nightly march of tens of thousands of "fairy penguins" from sea to shore.

This pair of Australian "waterfalls" appear to be falling straight across the land.

One of the best beaches in the entire world.

This beautiful train graveyard is one of the largest collections of steam locomotives in the Mediterranean and Europe.

Famed architect Antoni Gaudi built this generous thank you gift to a friendly host who housed him during a job.

Abandoned Nazi train station turned underground astroparticle laboratory.

The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A historic Christian shrine nestled within a spectacular natural cave.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.