Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

One of the world’s most colorful cemeteries, where each pigment is symbolic.

A hidden three-foot-wide house separates these two regal churches.

Building owners can take out tiles for free at this repository for historic building materials.

Elaborate tile work in this railway station tells the story of Portugal.

Ancient catacombs form the foundation for this Rococo orgy of a church.

The stunning interior of this Gothic church is covered in ornate gold details.

The gravestones in this historic cemetery are carved with mysterious faces.

Tucked away inside a historic Savannah hotel is a hundred-year history presented in ladies' lids.

"X" marks the spot of an echo chamber in the middle of a plaza.

The "last unrestored grand mansion of Savannah" is now a cramped, mouldering maze of antiques.

A secret climbing tree hides along the side of a Costa Rican road.

The history and future of cannabis.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

Dolphins, ancient clams and hundreds of waterfalls make this one of the world's top tourist destinations.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

Half of a waterfall goes into the river while the other half seems to disappear.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A popular European tradition makes its way to the states on one of America's most famous bridges.

In paradise, feral pigs have claimed an island all to themselves.

Tour the world's largest deep-hole dimension granite quarry, where you can view the plant where gravestones are made and roll a ball down the outdoor granite bowling alley.

A unique waterfall that some believe attracts the fairfolk.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.