Natural rock water slides hidden in the remote forests of northern Idaho.

Mine your own precious stones.

These memorials built by an eccentric bachelor on the side of Interstate 5 cause both wonder and traffic accidents.

Ride a mechanical corn dog at the alleged birthplace of America's favorite deep-fried wiener.

This gorgeous beach hides behind two headlands in Oregon's Ecola State Park.

By public opinion, this is Canada's knottiest tree.

Defying all odds, this lonely little tree found a home on a log sticking out of a Canadian lake.

At the most northwestern point of the contiguous United States lies a trail leading through an ancient forest to stunning cliff-side vistas and massive oceanside caves.

On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

Abandoned city hidden from the world by tropical forest and isolation on the coast of Kenya.

This sacred, circular cave is lined with pools so clear and still that it's hard to tell where the water begins.

Freddie Mercury's childhood home is now a monument to the iconic Queen rockstar.

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

After sunset the heart of Zanzibar's historic Stone Town neighborhood transforms into a culinary playground.

Over the course of its history, this tiny island has held enslaved people in transit and served as a quarantine zone. Today, it's a giant tortoise sanctuary.

Drink and dine in a coral cave that's at least 120,000 years old.

Stay in your own little bubble.

Some 20,000 dust-covered unwanted vehicles languish in the desert.

This vibrant side road in Doha was painted light blue to reduce heat.

This unique museum doesn't shy away from highlighting Qatar's role in the history of slavery.

Climb down into the largest sinkhole in Qatar.

Sleep snuggled in a sphere suspended atop the forest canopy of Vancouver Island.

Historic psychiatric asylum and most-filmed location in the Great White North.

Locals transformed this Canadian evergreen into a secret hangout with spectacular views of Vancouver's skyline.