This beautiful Miami garden was designed as a laboratory for tropical plants.

The oldest landmark of Toronto is a testament to shifting sands.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

A lush green oasis in the middle of Chicago.

Traditional 15th century Chinese garden in the middle of Vancouver.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

"Girl in a Wetsuit" is what happens when a sculptor has to find a way around a 100 year old copyright.

A walk through the historic city center, under the streets of Seattle.

Shoreline strewn with the remains of ghostly fallen trees.

This former coal gasification plant found a curious second life as a popular public park.

A surreal landscape where fanged rocks rise from the ground and the ocean feels like a great mystery.

This sandstone mansion was the home of two of Oregon's most important pioneers.

This extravagant Art Nouveau rest stop features a million-dollar view of the Columbia River.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

A Roman-style column in Oregon hides a spiral staircase inside.

A huge musical instrument played by the ocean.

Golden Gate Park's historic collection of plants.

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

Concrete strongholds stand guard over the Golden Gate.