Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

These ancient monoliths make up one of the largest archaeological sites in Palau.

This historic spot was where America's involvement in the Vietnam War officially came to an end.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.

The crumbling remains of Juneau's explosives storage site.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

This popular fishing spot at the outflow of a 4.5-mile long hydroelectric tunnel sports a jetty literally made out of classic cars.

A historic freight system that found the true gold rush is in tourism.

This decommissioned DC-3 now forever points into the oncoming wind.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

This WWII plane died a quiet death, and is now a garden eel playground.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

Peace Park and the Atomic Bomb Dome.

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.

A highway marker that honors a former spy plane pilot and local hero.

Once a popular hangout spot this huge mall was left to ruin after economic crash.

A crystal clear beach surrounded by beautiful coral reefs.

This former Union fort commands a fine view of downtown Cape Girardeau and the Mississippi River.

This abandoned nuclear cooling tower casts a shadow over a bucolic town.

Known as the “Official Greeter of Juneau,” this dog still welcomes ships and their passengers to Alaska.

This remote fort on the Yukon River is a vestige of the wild Alaska gold rush.