A fortified palace in the shape of a ship on the Thiou river.

A Swiss board game museum housed inside a picture-perfect castle.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

The Greek War of Independence was declared at this medieval Byzantine sanctuary.

What once sat in the world’s spotlight is today a largely disused ghost complex.

The toilet-shaped house of South Korea's sanitation pioneer is now a museum to the john.

Spies, love letters, and ghost stories have all left their mark on this home-cum-museum.

Home of Philip Johnson, one of the 20th century's most influential architects.

Sniff the Titan Arum's rotting flesh.

Alexander Hamilton’s creation caused quite a bit of controversy.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

This elaborate towering structure was once famed for its revolutionary height.

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

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

Copenhagen's celebrated theme park and gardens.

An idyllic hotel that gave its name to a supposed shadow government.

This large open-air museum showcases the ordinary lives of the people of the Netherlands and pre-industrial crafts and practices.

A floating cat sanctuary on an Amsterdam canal.

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

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

A 200-year-old collection of medical paraphernalia in a historic house.

The world's biggest floating museum in Gothenburg, Sweden.