The origin of the Nixon tapes is rooted in technological incompetence as much as secrecy.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This 11th-century castle sits so low you can't see it behind the surrounding buildings.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

Science meets wall art to highlight the beauty of famous mathematical equations.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

The 20-mile causeway that separates the Netherlands from the sea.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This unusual elevator doesn’t stop or slow down.

A beautifully eclectic mix of architectural styles.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This remarkable museum sprung from one of the most important prehistoric archaeological sites in the world.