Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

A miniature city, once ruled by the Queen of the Netherlands.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

The Rozenberg wind wall in South Holland makes for smooth sailing through the Calandbrug canal.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

This triumphal arch celebrating the Sun King's conquest of Lille is a masterpiece of military architecture.

Rich with fauna and flora, nature-lovers can walk across the sea at this UNESCO World Heritage spot.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

The NASA scientists behind Apollo 11 started out developing Nazi weapons at this abandoned German rocket factory.

This 1960's Soviet submarine in Peenemünde Harbor claims to be the largest submarine museum in the world.

The coffin-shaped church was once home to monks who slept in coffins.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

This 13th century Gothic brick castle is the largest in the world by surface area.

A relic of Poland's shipbuilding past, reborn as a sky-high lookout.

The site of a concentration camp where inmates were made to take part in one of the largest counterfeiting operations in history is now hauntingly empty.

One of the world's largest amber altarpieces is housed within this reconstructed medieval church.

Crooked windswept pines give this old forest an enchanted and magical look.

An otherworldly, fossil-rich cobble beach holds Viking graves, cairns, and other remains.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's narrowest alley is barely over two feet wide.

The widest waterfall in Europe is a natural wonder and one of the only places where fish are caught in the air.

This chimerical bridge/tunnel appears to dead end right into the sea.