The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This religious site features Nepal’s largest statue of Buddha.

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

Singapore's oldest Hindu temple.

The world's first combination ski slope and power plant.

A museum with a window view of the Himalayas and an on-site climbing wall.

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

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

The world's largest model of our planetary system.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

Sound travels strangely in this underground whispering gallery.

The scars of a remarkably organized public protest to save 13 elm trees are still visible in this Stockholm park.

Stockholm's narrowest alley is barely over two feet wide.

Stockholm's tiniest statue is of a small boy looking at the Moon.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Visitors to the National Museum of Nepal can moon over a set of well-traveled flags.

The world's first ice hotel is still one of the most elaborate and beautiful.

The sculpture shows a water rat turning the world upside-down, landing an elephant on its head.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

These eight mummies are the best-preserved human remains ever discovered in North America.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.