While not recognized by Guinness, this chocolate waterfall is likely to be the world's largest.

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

This legendary urban waterfall creates a dazzling display of rainbows.

These ancient sacred grounds granted amnesty to those who managed to reach them.

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

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

This black shoreline is made up of exploded lava particles.

A priest with no formal artistic training used basic house paint to create gorgeous religious scenes inside this historic church.

A controversial memorial at the place where Captain Cook met his violent end.

Try your hand at old-fashioned coffee growing at this museum devoted to one of the world's most coveted beans.

Celebrating the greatest pugilists the world has ever known.

Surprisingly aquamarine waters fill deep lakes formed at the end of the last ice age.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

This collection started by a Cornell professor once held more than 600 human brain specimens, including the one that belonged to its founder.

The library of every book lover's dreams.

World's largest herd of white deer populate a former U.S. Army depot.

This impressive working clock made of 16,000 plants changes its flowers twice a year.

A natural gas leak provides a flickering flame beneath a waterfall.

A tree full of wishes and footwear.

The birthplace of America's favorite fruit-flavored mystery dessert.

The “American Gothic" artist's largest works hang in an Iowa State University library.

Send a postcard while vacationing with Satan.