This impressive working clock made of 16,000 plants changes its flowers twice a year.

Learn about the last river many crossed to find freedom from slavery in the United States.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

A 19th-century architectural wonder designed by the "father of the skyscraper."

A monument to a Polish general who fought the American Revolution and became the "Father of the American Cavalry."

The only boathouse Frank Lloyd Wright ever designed was also the only unbuilt structure in his famous Wasmuth Portfolio, until 2007.

This overlooked gem outside Niagara Falls preserves and celebrates Iroquois culture.

This Frank Lloyd Wright summer house was designed along Lake Erie as a retreat for a client's wife.

The world's only statue dedicated to the greatest Great Dane in comic strip history.

The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

The only presidential monument to display a late POTUS's actual casket.

The heroic sled dog of the 1925 serum run is preserved in taxidermy.

A wonderful and easily overlooked museum tucked in Ohio's Burke Lakefront Airport.

A throwback train ride transports passengers through one of the lesser-known national parks in the country.

The world's tallest doric column is this Ohio monument to a naval victory in the War of 1812.

A chilling disappearance (and rescue) of a child uncovers a geological mystery.

Nature and art meet in this curvy creation

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

This whimsical park encourages its visitors and wildlife to roam on and around the various works of art.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

The largest historic preservation organization in the United States.

This tower-tomb honors a president who only held office for a little over a month but dedicated his life to his country.

A shoreline exhibit describing the disastrous first attempt by the French to colonize North America.