This New Orleans tree is filled with hidden chimes that produce a carefully tuned melody.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A "Texanic" (gigantic Texas) collection of Art Deco architecture at Dallas' historic Fair Park.

This collection of bronze hands comes from astronauts, presidents, baseball greats, and more.

A school-themed restaurant where gastronomy is the core curriculum.

This downtown Dallas art installation is always on the lookout.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

This unusual subway stop was originally a real estate office.

These whimsical works of art tell the story of the city's past and present.

More than a millennium's worth of municipal records preserve the political history of Austria.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

A fiery crater has been burning in the Karakum Desert since 1971.

The 40-year-old machine serves soda quicker than you can catch it for a mere 75 cents a pop.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

2300-year-old Roman road connecting the empire.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.