A massive concentration of algae is responsible for this lake's pink hue.

The oldest known European structures in Australia are the remnants of a story filled with mutiny, murder, jealousy and greed.

Visible from both land and sea.

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

This drowning bronze monument marks the spot where one of Australia's great engineers died by suicide.

Highly spherical boulders on the shores of New Zealand.

One of the world's largest pianos is displayed in the workshop of the man who built it as a teenager.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

This massive library holds what was once the largest book collection in the world.

Roadside attraction outside of a recycling center.

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

An abandoned marine theme park has created a difficult experiment in dolphin rewilding.

Started nearly 100 years ago, this science experiment just keeps on going, ever so slowly.

Clusters of huge boulders in the Australian Outback.

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

A sparkling sandstone cliffside that's worth a visit while it still exists.

This historic observatory contains the world's oldest refracting lens telescope.

One of Australia's largest secondhand bookstores.

A castle hand-built by a Spanish dreamer in the Australian tropical jungle.

An Australian lake whose pink hue defies scientific explanation.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.