Water

An engineering marvel at the time of its construction, this cross-border waterway sought to connect the Black Sea to the Baltic.

Africa's fourth longest river originates from a burbling spring in a secluded stretch of woods.

This whimsical fountain pays tribute to Toronto's four-legged friends.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

Legend says a primate-like cryptid prowls this otherworldy sliver of the Louisiana bayou.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

The rusted remains of an ill-fated freighter lie just off the coast of South Manitou Island in Lake Michigan.

A magical oasis in the middle of the Negev Desert.

Legend says those who drink from this trickle of water are destined to return to Montserrat.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

You can row a boat through this ancient underground reservoir.

Rare recess caves fill this unbelievably beautiful Ohio park.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.

The world's seventh-largest coral reef contains an incredible amount of biodiversity.

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