A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

This working class sculpture pounds his hammer all the livelong day.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

World War II bunker still standing on the New Jersey beach.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Mysterious rocks that ring musically when struck.

A walk through the historic city center, under the streets of Seattle.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

A unique sculpture park that specializes in the huge and bizarre.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This jail which was in service for over a century is now open for curious visitors.

One of the world's largest model railroads is a mind-boggling achievement.

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

Eccentric concrete mansion and museum designed and built by hand from the inside out.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

The "lovely red Vega" of the legendary record-settling pilot.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

A daily replay of the experiment that proved the rotation of the Earth.