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

Elevated freight railway turned wildly successful urban park.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A huge musical instrument played by the ocean.