Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Eight feet in diameter and more than 24 feet around.

It's big, it's a ball, and it's made of twine—the world's largest of its kind.

New Zealand's only running funicular railway.

The remains of a religious colony, its amusement park, zoo, and baseball empire.

The shortest river in America flows for just 201 feet.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

A single handprint, which, according to Ohio State University legend, cannot be scrubbed off.

A brick-paved former section of the historic coast-to-coast highway.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

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

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

A lush green oasis in the middle of Chicago.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

This sky-high radio mast is formerly the tallest man-made structure in the world.

A monument to the center of the North American continent may be off by a few miles.

This record-setting hydraulic dam in the Montana badlands was one of FDR's most ambitious public works.

Site of the greatest known waterfall that ever existed.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

Granting the right of way to ships over surface traffic since 1917.

An eclectic restaurant serving from and to the nearby Chittenden Locks.

A 50-year old dive bar that has its own yacht club.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.