A fountain standing as a testament to a doomed alliance.

Lehigh Valley barge No. 79 still gets tugged along - but now it houses a museum and unusual performances.

A modernist landscape of water and sci-fi concrete.

Public access to clean drinking water was an instant hit among the masses.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

On the Oregon coast there is a natural hole that seems to be draining the sea.

A clear blue swimming hole with hidden caves, still unexplored.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

The longest and tallest aqueduct in Britain can actually be sailed across.

This small town in the Netherlands has no roads but instead, miles of canals and over 100 bridges.

A well for a well, this anachronistically Indian-styled water pit was built in its small town home in gratitude for a similar favor.

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

This once-grand marvel of engineering is now 41 miles of scenic hiking trail.

A Beaux-Arts triumph set to become Ford's innovation campus

One of the world's largest model railroads is a mind-boggling achievement.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

Train tunnel running underneath Quebec City.

This historic railway museum may have lost its passengers but not its love for trains.

Elaborate tile work in this railway station tells the story of Portugal.

A historic hotel in an old California railroad town with a rowdy reputation.

A recently restored Shoreditch landmark with ties to Jack the Ripper.