Picturesque ruins once held off mighty armies.

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

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

A well-preserved 2nd century fort where moles are the archaeologists.

A lone pole once used to display a man's corpse now stands empty, but the memory remains.

A million and a half tons of earth were used to create one of the world's largest land sculptures.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This sculpture commemorates a naturalist and an illustrator whose work was a forerunner to modern field guides.

These plaques found across Warsaw commemorate the sites where executions or battles took place during the German occupation.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

Swedish mice can dine at the Nuts of Life restaurant or take a date to the amousement park.

Swedish skyscraper with a 90° twist.

This poignant sculpture of a gnarled weapon is a symbol of non-violence.

This collection of 80 polarizing foods aims to challenge your subjective notions of repulsion.

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

The only surviving piece of Copenhagen's 16th-century defensive wall.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

This ordinary street was made infamous by a legendary visit from the devil.

Copenhagen's celebrated theme park and gardens.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

A collection of noses tucked inside an art museum reveals how times have changed.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

Site of the first radio and telephone broadcasting companies in Copenhagen.