St. Augustine's record-setting narrow street was designed to protect against pirates.

In a city crazy for seashells this museum educates and amazes visitors using the wonder of cast-off exoskeletons.

The largest freshwater lake in the Florida Keys.

This phone booth-sized municipal building has been a piece of police property for more than half a century.

Public works and national defense project meant to carve a canal all the way across the state of Florida.

This state park was once an important Native American cermonial center.

Football field-sized microalgae production tanks on the Hawaiian coast create a stunning view from space.

This Hawaiian cattle ranch acts as a museum devoted to the island cowboys that predate the wild west.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

Birdhouses, peacocks, animal sculptures, and a graveyard are all found along this eclectic nature trail.

A museum dedicated to the history and art of staying clean.

This aging storage facility is the world's largest brick warehouse.

Nearly 2 billion seeds from 38,000 species are stored and processed at this visitable facility in a quiet corner of England.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

A hard-to-reach oasis in a desolate corner of Death Valley National Park.

The mysterious round rocks of Schooner Gulch.

The L.A. Zoo has a secret garden of rare bootleg cycads, a palm specimen dating back 280 million years.

Legendary prop shop filled with one man's collection of scientific curiosities.

A giant donut stands as a popular symbol of Los Angeles iconography.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

World's largest collection devoted to one fruit.

The collection of 80+ pieces created between the years 1100 and 1500 is intended to be seen, heard, smelled, touched, and tasted.

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