Annual convention held by the largest pyrotechnic community in the world.

What started as three small gnomes at the base of a tree has grown into a full-blown gnome home.

The second-largest (of only two in the world) large particle collider is the underdog of experimental physics.

A beautiful multicolored mound formed by the mineral deposits of the Orenda Spring.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

This lovely tree was a thank you gift from the man known as "Public Enemy No.1."

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

The final resting place of the Hollywood star who came to a tragic end.

Inside this 150-year-old barn turned antique shop is a vast array of items for curios hunters.

Don't get it twisted: This is the oldest pretzel bakery in the United States.

Every winter, dozens of otherworldly ice structures sprout up from a rigged up artesian well.

The largest freshwater lake in the Florida Keys.

This massive World War II calculator hearkens back to the days when "computer" was a job title.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

American involvement in World War I officially ended in 1921 in New Jersey, three years late and thousands of miles from the battlefield.

An abandoned tuberculosis hospital moulders on into an uncertain future.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

The great American road trip, but smaller.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

Where the embers of the Big Bang were first detected.

This roadside stand packs 300-plus varieties of tomatoes, from "Maiden's Fire" to "Kaleidoscopic Jewel."

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

Each winter this underground cave forms a dazzling ice palace.