A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

The watery grave of an impractical idea.

Italian cave with exceptional acoustics and an unsavory history.

According to Greek mythology, this natural spring is the home of a freshwater nymph.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

The burial place of one the greatest Arthurian authors, with the sword in the (grave)stone.

Public water fountains built during the Ottoman Era still stand throughout this seaside town.

The world-record holder for the longest bridge stretching continuously over water.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

This former guildhall with a bacon-like exterior is now home to a museum covering 600 years of Antwerp's musical history.

This legendary giant, born from vegetables, terrorized townspeople and cheated local children in games.

A man throwing a giant severed hand towers over Antwerp’s main square.

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

Most prolific publishing house in the 1600s open to the public.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Third time's a charm, or in this case, two testicles are.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Where Nor'easters go to die.

This 19th-century museum inside of a lighthouse is only accessible during low tide.