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

Dozens of musicians have planted trees in this Danish park, and donated songs to go with them.

A monument marks the beginning of the longest north-south road in the United States.

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

For over 300 years this little carving has been the city’s good luck charm.

The legendary court where emerging basketball players gain their street cred.

The Indian capital of black magic and witchcraft.

The world’s narrowest house makes for an awkward, four-foot-wide living space.

A warning to the weak-kneed: This narrow bridge does its swinging eight stories high.

Ancestral Puebloan ruins, natural arches, and box canyons abound in this seldom-visited corner of Monument Valley Navajo Tribal Park.

A centuries-old shrine where Indians pray for U.S. visas.

An abandoned asylum where patients have been forgotten but their possessions remain.

An elevator into the Baltic Sea.

A spiral staircase twists to the top of this unusual Czech lookout tower.

A museum dedicated to the silliest fruit.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

An homage to the humble watering can.

A semi-abandoned replica of Prince Edward Island's Avonlea—in Japan.

This 13-foot smiling peanut in Georgia helped Jimmy Carter win the 1976 presidential election.

This dramatic monument in Colombia honors a little-known indigenous fighter for independence.

This immigrant bridge once spanned the Thames but is now a fixture of an Arizona city.

Every year, a Louisiana town remembers a brief Civil War truce inspired by Masonic brotherhood.

This crumbling Portuguese ruin overlooks the populace it once ruled.

This long line of cement defensive wedges is named after the famous chocolate bar for obvious reasons.