This legendary urban waterfall creates a dazzling display of rainbows.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Once the tallest building in the world and the site of “the highest dinner ever held in New York” this building now holds the most expensive penthouse in the city.

The deadly but beautiful ornamental oleander was planted all over the island of Galveston after the hurricane of 1900.

Possibly the oldest living thing in Europe, more likely a pagan survivor.

A safe place for the wild donkeys of a hot vacation destination.

The world's oldest known salt mine.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

A cemetery housing wild west legends in South Dakota.

Balconies that have a most unusual accent.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This pebble beach is so beautiful that taking its rocks is against the law.

The site of Paul Revere's historic two lantern warning.

Stolen goods adorn the organ at Old North Church.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

One man's homage to the orange as realized through a long-term folk art labor of love.

The oldest working mechanical clock in the world.

Famously misunderstood wonder of the ancient world

Europe's largest prehistoric mound – burial site of a legendary king?

Hear the quietest sound from across the dome.

A naturally mummified 2,000-year-old man.

The final resting place of soldiers' loyal canine companions.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.