Hues of distinctive blue to bluish-green color the slopes of these hills.

This pirate-broadcasting-tower-turned-restaurant played a rebellious role in the history of Dutch television.

An underwater restaurant, surrounded by a coral reef.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

The tomb of one of the greatest travelers in history.

This statue points to another unusual companion work of art often overlooked by visitors.

The largest hand-carved, outdoor sculpture collection in the state of Maine.

Sit at the "Disney table,” where Walt and his team of "imagineers" once dined on the regular.

Last residence of H.P. Lovecraft featured in his story "The Haunter of the Dark."

The equator passes through this tiny island in the eastern Atlantic.

The narrow mountain road that carves a path between Florence and Victor is tied to ghost towns and ghost stories.

Beneath an ancient wishing tree lies an underground chapel with 12th-century frescoes and catacombs dedicated to a lady saint.

An unusual slot canyon in the Aztec/Navajo Sandstone has a cross-section like an inverted old-fashioned keyhole.

The tunnel's elegant proportions keep you snug with no claustrophobia freak-out.

This psychedelic tourist trap is a leisurely descent into madness.

Hamburgers are intensely proud of their tunnel beneath the river.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

A repurposed railway tunnel with otherworldly acoustic characteristics.

Home to the longest wooden escalators in the world.

This former train tunnel is filled with lines from a poem crafted by Robert Louis Stevenson.

Once a sewer culvert, this road tunnel now offers cyclists and pedestrians a subterranean stroll under the C&O Canal.

An abandoned railroad tunnel transformed into a creepy path for hikers and cyclists.

A unique rock formation that only a few have managed to venture inside.