This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

Europe's only museum solely dedicated to the history of whaling still has a fully-functioning whaling ship.

This city park was once a lookout point for George Washington’s army during the Battle of Brooklyn in 1776.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A bronze kitty adorns the grave of the polar explorer who brought the original feline to the Antarctic.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.

No one knows who built this strange cave of worship or exactly why.

This shallow cave got its name from copious amount of human bones found inside.

A statue in the heart of Edinburgh honors a bear that served in the Polish military during World War II.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

This nostalgic Russian museum is full of USSR cultural artifacts from the 1970s and 80s.

A walkable map of the world, made from soil and stone by one man.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This giant roadside goose has been hailing travelers into a small Ontario town for over 50 years.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

This Canadian city is actually two-in-one, even if they only respect the timezone of one side.

The sun acts as a key that only fits this giant keyhole twice a year.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.