Where manatees are the snowbird vacationers in these balmy Florida springs.

The scuba diving training facility was named for the steam that rises from the cave's chimney.

The only runway directly into the magic kingdom has been closed since 1972, but it still sings to you if you drive fast enough.

A true treehouse near Hawai'i Volcanoes National Park.

A beach made of semi-precious green sand on the Big Island of Hawai'i.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

Museum precariously perched on a massive yellow pillar.

Many cities have held the title, but Brazil snatched the crown from Chile in 2011.

This striking, two-toned confluence of rivers is visible from space.

This gravesite in the Amazon Rainforest was left behind by a failed Third Reich expedition.

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

These termites have an large and deadly abode—impressive by day, dazzling by night.

Beautiful public park off the beaten path and away from tourists.

Massive rock sculptures formed during the time of the dinosaurs still stand undisturbed.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

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

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.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

The unique ecosystem atop an Australian mountain is home to some colorful inhabitants.

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

Australian Lake set aglow by Noctiluca Scintillans.

An Australian lake whose pink hue defies scientific explanation.

Derelict airplane bodies serve as both home and income for three Thai families.