Singapore's landscaping project is home to 18 incredible Supertrees.

The largest pool at its elevation sits on top of one of the most expensive resorts in the world.

This indoor ski resort has a mountain contained inside a mall.

The final resting place of the great navigator, or maybe his brother.

A beautifully eclectic mix of architectural styles.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

One of downtown Berlin's last reminders of its Communist past.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

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

This futuristic bridge is one of the longest self-anchored pedestrian bridges in the world.

A large circus museum with summer performances.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

No one's quite sure where this quirky university tradition originated.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Tasked with beautifying a disused stretch of industrial land one artist filled a hole with grass.

Less a museum than a bizarre fantasy world created by artists and engineers.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

A shining, cold, black organ lies in San Francisco's financial district.

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

Famously misunderstood wonder of the ancient world