An experimental forest at the foreground of arboreal science is also the canary in the coal mine for climate change.

A surprisingly beautiful abandoned World War II military base in East Greenland.

Glacial lake that mysteriously empties itself every year.

This tiny square mile of Canadian sand was once considered the world's smallest desert.

A 605-page Quran penned in the blood of a dictator is locked away in a mosque.

The tallest unclimbed mountain in the world remains poorly charted out of respect for local spirits.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

A swing to dangle you off the very edge.

America's smallest "national forest" has only 33 trees.

The former 1920s mansion of a prominent Catalan developer was used as the Soviet Embassy during the Spanish Civil War, and there is still a bunker below the garden.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

The United States Capitol's former columns still stand.

The world's tallest bridge is also possibly the most elegant.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

This railroad magnate's 19th century tower is more than a little bit out of place in the Nevada desert.

The remote outlaw hideout of Jesse James, Butch Cassidy, and the Sundance Kid.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

Certain traditions prevail on the least-visited island of the Aran Islands.

Paranormal activity on the great lakes.

Stunning examples of Russia's 18th-century wooden architecture.

This chimerical bridge/tunnel appears to dead end right into the sea.

The ghostly remains of what was once the world's richest copper mine.