Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

A popular Icelandic children's story comes to life inside this cave.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

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

The world's largest wooden structure.

This unusual rock formation looks like an apple that has been neatly sliced in half.

A dazzling display of lights and crystals.

Marvel at this turn-of-the-century masterpiece that has been turned into a rather stately supermarket.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

A self-funded cemetery with a long list of inhabitants.

At a mile long, the Fort Madison Bridge is the largest double-decker swing-span bridge in the world.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

When waves crash onto this section of beach, the rocks sing a song.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

The last street in Pittsburgh that's paved with wood.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

There aren't too many operational funiculars around, but Pittsburgh has two!

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.