This bike path traverses the treetops.

An open-air sewer system that was covered piece-by-piece over 300 years.

The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

This giant urban staircase was built to keep the city's brave fighting men from getting waylaid in the red light district.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

An undulating wicker beast looms peacefully atop a sand dune in Belgium.

The highest point in Belgium is a staircase to nowhere.

The site where one of the most famous poems of World War I was composed is preserved to honor the legacy of the work.

This bike path was sunk below water level for maximum wonder.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

A fantastical bed and breakfast with magically unique rooms.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

The "stairway to heaven" lookout tower was built to resist weather, arson, and the laws of physics.

Artwork tucked within the trees greets visitors with surreal sonic experiences.

Christ's blood preserved in a Belgian town.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

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

Medical history with an amazing, if frighting, collection of wax diseases on display.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.