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

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

A feminist who put a pretty face on suffrage when she rode a horse through the Capitol.

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

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

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

This dramatic rail curve was once the target of a failed Nazi attack.

A local prank turned town icon.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

In which a local geological marvel becomes a quaint roadside attraction.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

A world-class collection of mechanical musical instruments and automata.

This massive boulder is either a unique rock formation created by glacial melt or a magic energy vortex.

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

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