A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

The absurd creation is a compulsory destination for selfies in Buffalo.

There aren't too many operational funiculars around, but Pittsburgh has two!

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

This collection honors the iconic, and proudly American lighter that just won't quit.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

The house where John Wilkes Booth conspired with his co-conspirators.

Largest Roman Catholic church in North America.

The only Civil War battle in Washington D.C. took place near this highest natural point in the city.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.