The tallest sea cliffs on the Southern Hemisphere are a climber's worst nightmare.

Woven tree art gives this towering Australian woodland a touch of mystical whimsy.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

An Australian lake whose pink hue defies scientific explanation.

Once the path of a railway tunnel, now home to thousands of glowing insects.

An abandoned railroad tunnel is now filled with bioluminescent bugs.

This massive water spout has been luring visitors for hundreds of years, some to their death.

The only pollutant in the clear blue water is sunscreen.

A massive stairway that almost wasn't leads to one of Australia's most scenic vistas.

An ancient rock engraving shows Aboriginals used their advanced knowledge of the stars to hunt and gather.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Come for the flowers, stay for the bats!

The Australian lorikeets that like to tie one on in an annual drinking binge.

Clusters of huge boulders in the Australian Outback.

Some of the clearest water anywhere in the world.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

Taumatawhakatangihangakoauauo tamateaturipukakapikimaungahoronuku pokaiwhenuakitanatahu.

These phallic stone spires once served as Tolkien's Paths of the Dead.

A perfect turquoise lake colored with glacier dust.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

A stone wall that mysteriously moved three feet from its foundation.

This burial pyramid in central Ireland is thousands of miles and thousands of years away from its Egyptian inspiration.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.