This huge pile of volcanic boulders hides a stunning network of secret grottoes.

A mountain of conch shells created by centuries of fishermen.

Impossibly life-like natural history models created out of glass by a father and son.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

Cryptid lake monster honored with its own monument.

"Holy Wisdom" overlooks the city that became its namesake.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

This smiling statue memorializes local cartoonist Bob Montana and his legendary creation.

A serene plaza that commemorates one of the Granite State's most iconic figures.

The exact whereabouts of this surreal cabinet of curiosities are rarely the same place twice.

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

Final resting place of one of the classic authors of horror literature.

Limestone grottoes turns everyday objects into stone.

An exquisite tunnel of cascading flowers.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

A terrific purveyor of natural history objects and curios.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Hot springs monkey spa in the middle of Hell's Valley.

Tucked in the back of this amazing antique store is an important piece of medical history.