Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

A tribute to Ponce de Leon's supposed quest for eternal youth.

The highest point in Tennessee, Clingmans Dome bears witness to the ravages of one type of insect.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

This Seattle joint serves food inside an old train car once used by FDR.

A short hike into the mountainside forest reveals a decaying 1890s town.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

Not quite the menace it once was, this monster still has some chops.

This Buddhist temple is home to the graves of the Japanese national legends, the 47 Ronin.

This replica of the Greek structure is in the heart of Nashville.

This historical theme park celebrates all things noodle.

An obscure waterfall that looks like something out of a fantasy novel.

The original "capsule building" is a masterpiece of Metabolist architecture.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

A 20-meter (65-foot) robot towers over Tokyo Bay.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The best Tiki bar in Las Vegas.

A wall of chewing gum moonlights as collective art.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This spectacular track has run continuously since 1882.