In upstate New York, gorgeous waterfalls and a watermill are slowly being reclaimed by nature.

Elephant seals and sea lions have turned the abandoned buildings on this island into their endangered love shack.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

Experience a charming 1930s version of "infotainment."

The only road through the heart of Glacier National Park.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

An homage to everyone's favorite prehistoric cartoon family.

Golden Gate Park's historic collection of plants.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

The first green space constructed on an elevated viaduct.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

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

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

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Roman ruins top white travertine terraces formed by ancient hot springs.

Once the private home of China’s most legendary tycoon, getting inside this stunning mansion no longer requires an elite pedigree or acts of daring.

An abandoned Cambodian resort that mirrored the downfall of the country as it was happening.

A former French military respite turned jungle tourism hotspot.

5,000 skulls in memorial to those killed by the Khmer Rouge.

Khmer Rouge's high security prison.

This historic stone bridge has an entire neighborhood clinging to its sides.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.