Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The oldest Jewish cemetery in Europe survived Hitler's Germany.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

A hugely vast Irish landscape of barren rock that stretches for miles.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Every inch of this chapel is covered in craftsmanship from across the world.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

The modern birthplace of Irish freedom.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

100 massive sculptures in the Hudson River Valley.

Avoid gangster interaction while window-shopping.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.