This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

The most impressive of Basel's three remaining city gates.

This artistic fountain display pays homage to this area's theatrical history.

The smallest museum in Basel, Switzerland, is a two-foot-by-two-foot window in the door of a 600-year-old house.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

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

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

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Once a meeting point for great thinkers, and the midpoint of the country.

The world's first combination ski slope and power plant.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Hans Christian Andersen for the postmodern world.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

Visit a sweet shop selling one of the first candies ever made and sold in America.

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.