A giant open-air sculpture made of over 200 full-sized boats.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A marvel of Byzantine engineering under the streets of Istanbul.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

At Macon’s oldest cemetery two members of Allman Brothers are buried side by side.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

A statue honoring 44 continuous years of greeting passing ships.

"X" marks the spot of an echo chamber in the middle of a plaza.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

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

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

A secluded, little-known temple hidden amid the dense jungle.

Singapore's oldest Hindu temple.

This statue once earned the distinction as one of the "Three Major Disappointments of the World."

This Singaporean food-court stall was home to the world's cheapest Michelin-starred meal.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

This angular brutalist playground turns playtime into modern art time.