One of the oldest colonial buildings still standing in South America.

Alongside a scenic road are the remains of crumbling World War II gun emplacement.

Visible at low tide, this rusting vessel is one of the last surviving examples of the X-Class "Midget" submarines.

A simple memorial between a ball field and a skate park honors 21 men lost in a horrific mining accident.

This gold mine–turned–swimming hole is the perfect summer picnic spot, immersed in nature and history.

This small beachside park commemorates the possibilities of discovery.

A massively oversized measuring tape sculpture sits inside a hidden yard.

According to local legends, the shallow sandbar that allows visitors to walk across Orhaniye Bay has a tragic backstory.

The trunk of this 700-year-old tree measures more than 60 feet around, making it the oldest and largest baobab in Sri Lanka.

This former World War II artillery defense site was built to guard the industrial city of Glasgow.

The hike to this stunning waterfall on a black sand beach is not for the faint of heart.

A quaint village where bomb casings from the Second Indochina War have been repurposed into mundane objects.

A giant piece of cutlery designed to remind us about the origins of our food.

The supreme shrine of the state.

A lonely memorial to the 107 victims of Pan Am Flight 812, which crashed in Bali in 1974.

One of the world’s longest pedestrian suspension bridges.

This poured-concrete water reservoir is a gem of modernist architecture well-hidden in a city forest.

Of the many Jesuit missions in South America, this complex is one of the best preserved.

Trees emerge from the surface of this small man-made reservoir.

The largest Roman amphitheater in the Balkans once held over 20,000 people, but managed to lay hidden for hundreds of years.

The beehive-like buildings of this abandoned resort reside near the border of Mauritania and Senegal.

On an island south of Iceland, a large volcanic rock formation resembles an elephant.

Fifty years after a “blast blasted blubber beyond all believable bounds,” this idyllic natural area commemorates the carnage.

According to legend, those who pray at this statue will also be granted a wish.