Rushing water plunges over a 100-foot drop created by an ancient lava flow at this majestic waterfall.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

One of the best places in Florida to spot rare, carnivorous pitcher plants.

This beautiful Miami garden was designed as a laboratory for tropical plants.

A luxuriant botanical garden below sea level.

A hidden beach at the end of a tunnel of mangrove trees.

Japanese gardens dedicated to the Japanese farmer that refused to throw in the trowel.

This beachside town is home to a diverse nature reserve, multiple cays, and one of the three bioluminescent bays in Puerto Rico.

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.

Home to an endangered salamander, a full moon celebration, and a large spring-fed outdoor swimming pool.

A long-forgotten Victorian swimming hole is still a fun spot for a dip.

These azure waters were thought to lead to the Mayan Underworld.

The world is full of swimming holes, but few compare to Samoa’s idyllic To Sua ocean trench.

Take a dip beneath the stalactites in this amazing cenote.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

The frozen bubbles that form on the icy surface of this Canadian lake contain enough methane to create a small explosion.

East meets West in this Japanese-style garden featuring plants native to Maine’s Mount Desert Island.

This grove of ghostly cedars was killed in 1700 by an enormous tsunami, felt from the United States to Japan.

Bioluminescence in the reefs of the Maldives causes the sea to glow like a starry night sky.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Bioluminescent firefly squid light up this Japanese fishing port.

Tubing through a cave lit with glowworms is a magical underground experience.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.