Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

A hidden gem, named after a San Franciscan icon, offers spectacular views of the Pacific Ocean.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Shoot for par over the bodies of the dead on this cemetery-cum-golf course.

Guns that have been defending San Francisco since 1904.

The United States' first transcontinental automobile road came to its end at this spot in San Francisco's Lincoln Park.

This smiling statue memorializes local cartoonist Bob Montana and his legendary creation.

The summer home and later final residence of acclaimed American sculptor Augustus Saint-Gaudens.

The 100-year-old public collection of a New Hampshire dentist that contains taxidermy, Native American artifacts, and a pair of mummy hands.

The once-abandoned 140-year-old hotel used in the movie "In Dreams."

Annual celebration commemorating the 1965 sighting of strange lights in the town.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

Even Henry David Thoreau found this glacial pothole irresistible.

This narrow canyon has been carved by the river over thousands of years into spectacular and curious forms.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

One car at a time please.

Five mythical trolls have taken up residence in woods and hidden on paths at the Coastal Maine Botanical Gardens.

Despite its extensive history, this fort saw little to no combat.

Its unique collection details the history of the state's svelte railroads.

Stone monument honoring a town founder has a witch-boot shaped stain and a curse to go with it.

Abandoned Italianate architecture on the coast of Maine.

The first bridge observation tower in the U.S. offers one of the best views of Maine.

This 19th century granite fortification is one of the most well preserved forts in New England.

The world's largest rotating world.