Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

This stately clubhouse has showcased German-American culture for over a century.

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.

Commemorating the spot where the famous scientist fed his pigeons.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

The site of the deadly Triangle Shirtwaist Factory Fire.

The most confusing clock in New York.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

A vibrant, 100-foot-tall mural dedicated to Evelyn Nesbit, the tragic icon of the Gilded Age.

Classy up your Big Mac with bow-tied servers and chandeliers at the world's fanciest McDonald's.

The fine fabric handwoven at Biltmore Industries was once coveted around the world.

This rare basilica nestled right in downtown Asheville is an architectural marvel, inside and out.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

This bridge is haunted by the ghost of a distraught mother.

This giant iron playfully pays tribute to an early 20th-century architectural trend.

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.

Carrying on the legacy of a short-lived experimental school tucked away in the mountains of North Carolina.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

The oldest continually used church in Minneapolis also sells great meat pies.

This old residential building was once the largest flour mill in the world.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

When flour explodes, it's not a pretty sight.