A secretive collection featuring objects that were designed specifically for U.S. intelligence operations.

The final resting place of New England's last "vampire."

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Mysterious glowing orbs float through the desert night.

New fungal and bacterial species call this deadly lake home.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

Treehouse motel and treehouse-building school.

This massive mushroom has spent centuries eating its way across a huge swath of Oregon.

On the Oregon coast there is a natural hole that seems to be draining the sea.

This Oregon farm is dedicated to teaching people the professional art of tree climbing.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Dig for your own trilobites in this goldmine of invertebrates.

"Only the devil could play golf here."

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

One man's homage to the sun continues to grow like a glass fractal.

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

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

This little-known, 35,000-specimen collection in Greece is a lepidopterist's dream.

A Buddhist temple to honor insects that died for science.

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

Specimens collected by the author of "Lolita" and self-taught lepidopterist are exhibited in his childhood home.

Malaysian fireflies create a dazzling display as thousands light up in unison.

Home to items never before seen by the public.