Some claim these desert ruins are from the legendary "Atlantis of the Sands."

Nature's water park in the Wadi Bani Awf valley is full of pools flanked with cliffs and natural water slides.

An imposing Omani fortress surrounded by date palm trees.

This slowly crumbling mansion was home to one of East Africa's richest and most powerful slave traders.

One person’s lost luggage is another person’s treasure.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

The home of a 19th-century author who brought African-American folktales to the mainstream is now Atlanta’s oldest house museum.

An old bank vault in Atlanta is now the eternal shrine to the King of Rock and Roll.

The arch that celebrated the completion of the Lincoln and Victory highways.

This wilderness hike to a waterfall has an unlikely beginning in suburban Reno.

This beloved roadside attraction welcomes visitors with his signature neon smile.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

The West's first incursion into the Afghan world lies buried beneath a military base.

An underground city of salt.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Real bones which are said to have belonged to a Polish dragon.

Small rustic cabin nested in the mountains of Killington, Vermont.

A cable-suspension footbridge that hangs high above the Mill River.

This shale formation along the Appalachian Trail once inspired the third president of the United States.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

This elaborate towering structure was once famed for its revolutionary height.