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

Edinburgh's oldest statue hides within a parking lot behind the city's iconic cathedral.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The longest and tallest aqueduct in Britain can actually be sailed across.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

Opened in 1976, this monster-sized version of the fast-food franchise is sometimes called the Epic McD.

Measuring approximately 200 feet long, Swampy is the world's largest alligator-shaped building.

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

Possibly the oldest church in Barcelona, this basilica has its pagan and Christian mythologies all mixed up.

This fountain was designed to honor the man who helped bring water to Barcelona.

Visitors can swim with vicious predators in Crocosaurus Cove's plastic daredevil enclosure.

These flying foxes dangle from the trees around the library like fuzzy black fruit.

This public art is inspired by a local Aboriginal creation story.

Dozens of large-scale, creative, evocative curios from prominent artists dot the calm outdoor space around this major museum.

A stargazing sculpture made from the ruins of an iconic telescope.

A train car sitting on a rooftop makes an unlikely and picturesque setting for dinner.

The 18th-century home was disassembled into 253 cases and brought all the way from the other side of the world.

Somewhat controversial when first unveiled, this gathering of sea creatures has become a hidden gem.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.

A colorful street named for the legendary Australian rock band.

Once housing children next to hardened criminals this historic jail once displayed Ned Kelly's skull until it was stolen.

A tranquil gallery and sculpture garden situated within the classic Australian bush.