How a friendly mining-school rivalry, two adventurous students, and 400 tons of limestone created a Platteville landmark.

It is the oldest remaining stairway William Penn created to give Philadelphia citizens access to the port area.

As the oldest natural history museum in the Americas, these halls contain everything from dinosaur bones to biological samples collected by Lewis and Clark.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

A goofy attempt to generate business for a repair shop turned into one of Ottawa's favorite tourist attractions.

The name is a dubious distinction for the man who ordered a full retreat during what is considered the first engagement of the Black Hawk War.

The first federal construction project authorized under the Constitution

A commemoration of child soldiers during a fearful battle of the Civil War.

This deserted island off the coast of Philadelphia is only visitable a few days every year; once industrialized, it is now an ecological marvel.

This iconic lounge is home to the longest running drag show in Philadelphia, iconic jazz trios, and is the birthplace to the infamous "Citywide."

An historic lighthouse accessible via a half-mile walk through a nature preserve and freshwater tidal wetlands.

A remote island marking the entrance to Death’s Door, surrounded by the bones of ships who failed to heed her warnings.

A massive fossil of unknown origins

The mural faces the football stadium and has been known as Touchdown Jesus since 1964

World Trade Center memorial likened to a woman's sexual organ.

Where some of America's earliest LGBTQ rights protests marched each Fourth of July

A merry-go-round that became a rallying point for the early Civil Rights Movement.

The Corinthian columns that towered over Abraham Lincoln’s inauguration stand proud.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

This was the first ever National Lakeshore, established in 1966.

A memorial dedicated to the famed North Pole explorer appropriately sits at the far edge of Arlington National Cemetery.

This stately brick building once provided supplies and equipment to lighthouses across the northeast during the 19th and 20th centuries.

At the birthplace of American railroading, a world-class collection of historic trains.

A granite monument honors a beloved World War II canine mascot.