London's smallest police station is barely the size of a phone booth.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

This saucy statue once caused outrage among locals.

A long-buried ancient ruin unearthed right in the middle of the city.

Southern Italy's spinning top village.

A dead saint, a deadly poison, and a mysterious holy ooze.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

This winding road through an Italian canyon may be the most scenic drive in the world.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Pilgrimage site for star-crossed lovers.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

A cone-shaped top and cylindrical body set this 900-year-old structure apart from other Italian bell towers.

When a massive landslide hit one of the world's tallest dams it created a tragic environmental disaster.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

An island on the Venetian Lagoon hosts this stone chair that has nothing to do with the King of the Huns.

A twisted steel beam from the wreckage of the World Trade Center is the centerpiece of this memorial for those who died on September 11, 2001.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.