This coastal cavern is associated with the Hawaiian god of creation.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

A unique botanical garden housed in three giant geodesic domes.

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

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

Illegal drag racing two stories beneath Chicago’s streets.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A lush green oasis in the middle of Chicago.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

Duluth mineral magnates built this charming art deco lodge to be their private clubhouse.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

Belly up to the bar in Cowtown, don't forget to buy some boots.

The man who wasn't there.

A trio of colossal statues spread across a Dallas neighborhood chart the emergence of a giant robot born of a locomotive and spilled gin.

This grand Spanish-Cuban restaurant has been serving customers for more than a century.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

A modernist landscape of water and sci-fi concrete.

This vintage "streetcar boat" lay at the bottom of Lake Minnetonka until the 1980s.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...