The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

The massive machine creates cracking displays of indoor lightning.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

You'll find the little birds tucked within the rocks of this Australian beach.

Come for the flowers, stay for the bats!

An unphotographable nightly march of tens of thousands of "fairy penguins" from sea to shore.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Former abode of notable poet, complete with literary references and stories of ghosts.

Inspiring Herman Melville and Henry David Thoreau, Mount Greylock in western Massachusetts is the highest point in the state at 3,491 feet above sea level.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

Unicorns, elephants, and bears, oh my!

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

An 80-year-old house built out of newspapers.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

America's oldest archaeological site or a muddled case of wishful thinking.