100 year tradition of fist fights, marked by marble footsteps.

Go inside to really appreciate this 500-year-old technological masterpiece.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

The world's oldest known salt mine.

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

The world's largest collection of ticks.

Haunted Victorian house that inspired a legendary "Ghostbusters" court ruling.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The world's largest fire hydrant is supposedly tornado-proof.

This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

This bare tree might not have leaves but it is constantly clothed in festive decorations left by mysterious local benefactors.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

Paths are maintained, but trees have taken over plots.

Twenty-eight years after this local landmark was washed ashore by hurricane Hugo, it was washed away by hurricane Irma.

One of the oldest living oak trees in the Southeast.

First established in 1696, this settlement was abandoned after the Revolutionary War.

Tour the oldest unrestored plantation house in America that is open to the public.