Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

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

Former meatpacking facility turned vertical farm and sustainable business complex.

A science teacher's dream.

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

To find the "unicorns of the deep" you've got to go downstairs.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

These pretty kitties killed and ate as many as 135 railway workers.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

The "Seinfeld" diner.

This giant boulder is sandwiched between apartment complexes in upper Manhattan.

A large boulder marks the place where the island of Manhattan was purportedly "sold" to the Dutch.

Little Red Lighthouse under the George Washington Bridge.

A celebration of capitalism in Midtown.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

A National Historic Landmark with a scenic clock tower and park filled with deer and peacocks, plus a military museum.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

A giant lumpy candle serves as a beacon for this highly scented pit stop.

Walk in the footsteps of the famed astronaut at Purdue University.

Nature and art meet in this curvy creation