A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

In an area where the remnants of WWI are discovered on a regular basis this preserved frontline trench may be the most amazing.

Christ's blood preserved in a Belgian town.

This modern arts center is built around a gem of late-Baroque architecture.

A little sculpture with a large wardrobe.

A rare example of World War I trenches from the British front.

Theme park featuring miniature replicas of European monuments.

Cozy basement bar sports an inventory of over 2,000 beers.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Climb inside an iron crystal magnified 165 billion times its normal size.

Atop this former dutch railway office sits an interstellar work of art.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

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

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

Amsterdam's former hotspot for public executions and dissections.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This unattributed sculpture in Amsterdam is hiding in plain sight.

The attic of a four-century-old canal house hides a clandestine church.

A statue representing a lost Roman profession that was vandalized for centuries.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.