An eerie natural formation that looks right back at you.

Eat the ultimate iteration of Portugal's most beloved pastry.

An unusual and beautiful form of mass transit serves the city's steepest neighborhoods.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This stunning concert hall has become a symbol of Iceland's national recovery.

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

Giant WWII fortresses that fired 8,000 rounds a minute, now home to thousands of pigeons.

Rainbow shutters decorate this former police station.

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

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

A 50-foot tile mural mosaic for the 100-year anniversary of the Statue of Liberty.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

The blinking light atop the iconic landmark has been sending secret messages for decades.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

An eerie, derelict amusement park in Berlin.

A hidden three-foot-wide house separates these two regal churches.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.