This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A military museum and library dedicated to the citizen soldier.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

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

Inside the unassuming cemetery chapel is a magnificent stained glass window and mosaics.

America's oldest archaeological site or a muddled case of wishful thinking.

Annual celebration commemorating the 1965 sighting of strange lights in the town.

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

The seat of Buffalo government is a gorgeous Art Deco palace.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

A building so large that it has its own weather.

See prehistoric footprints, plus two complete mastodon skeletons.

A memorial to Chinese freedom in the city where American freedom was born.

This beautiful Brooklyn monument over a crypt memorializes a grim and largely unknown story from the American Revolution.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

Everyone's invited to put on a miniature concert with this world-class musical wonder.

This museum explores the history and development of dentistry and dental technology in Michigan.

A physical reminder of Earth's ancient past, this rock results from the photosynthetic processes of some of the oldest forms of life.

These strikingly barren, rolling red hills were caused by bad farming practices.

One of the largest underground systems runs under Canada's largest urban center.