An underwater statue of Christ blesses the depths off Key Largo.

A remarkable time capsule of American manufacturing deep in Maryland coal country.

The place where Samuel "Slater the Traitor" brought the Industrial Revolution to America.

The remnants of a 19th-century ironmaking complex hidden in the woods of Connecticut.

A handful of beehive kilns are all that’s left of a historic brick-making empire.

This mill played a key role in the region’s development and it is just one of ten along the east coast of the United States.

Two well-preserved charcoal kilns survive in a remote part of eastern Nevada.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

The birthplace of the Herndon Gas Company.

A relic of the region's once booming timber industry.

The first blast furnace in the United States that used coal and coke fuel instead of charcoal to make pig iron.

The lasting remains of the region's once booming cement industry.

A tall smoke stack and boarded-up buildings are all that's left of the pioneering plant.

The translucent turquoise hue of these natural swimming pools comes from a high concentration of minerals.

This wildlife refuge is home to more than 200 species of birds, as well as monkeys, lizards, and other wildlife.

Costa Rican accommodation resembles a crash site, but with a nice balcony.

One Costa Rican island is so beset by illegal shark poachers that the local rangers have built an entire bridge with their confiscated gear .

In Costa Rica's cloud forest, the roots of a woody ficus create a botanical bridge.

There is a small island in the Gulf of Nicoya where the only human inhabitants are dead.

Once the foundation for a mansion, these ruins now offer amazing panoramic coastal views.

Balanced rock sculptures pay tribute to a murdered conservationist and his pioneer wife.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

This garden has existed for more than three centuries.

Celebrated in poem, this tiny hidden cemetery has a big and grisly history.