Once the future of underwater combat, this old sub is now open for visitors to muck around in.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

A manifestation of modernist architectural ideas, this massive, multi-purpose building was one of the first of its kind in Southeast Asia.

This fountain was once heralded as the largest in the world.

Singapore's oldest Hindu temple.

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

A historical convent known for taking in bad luck babies left on its doorstep is now an upscale shopping center.

The most playful of the life-sized statues that make up Singapore's "People of the River."

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

The highest pedestrian bridge in Singapore looks like a series of undulating waves rising between two public parks.

A Buddhist theme park brings you a Buddhist version of Hell.

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

A series of abstract, silly sculptures represent the works of a great modern classical composer.

A Parisian cemetery where the elite and artistic are interred beneath an eccentric collection of tombs.

Egyptian Revival movie palace abandoned for decades and restored in 2013.

This modest marker near Notre Dame identifies the very center of Paris.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

France's most famous cemetery, with some of its most curious tombs.

This stately estate house features a tower covered in a bright, modern mural.

Largest lake in Great Britain measured by surface area.

These semi-natural waterfalls hint at the park's Victorian-era industrial past.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

A serene public space nestled within the remains of Glasgow’s Victorian maternity hospital