Native Americans built this circle of stones, which was used to predict astronomical events.

Week-long block party becomes a competition for the best decorated street.

A 12th-century Italian skirmish gets reenacted with 500,000 pounds of flying citrus.

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

Ancient burial grounds of the wealthy.

It houses the remains of a 17th-century version of the Titanic.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

Early habitat dioramas and home of the elusive gaff, the skvader.

Largest island in the Baltic Sea experiences such idyllic weather that roses bloom in the middle of December.

Architectural monsters are devouring this palace's every door and window.

The Columbia Road Flower Market is now open every Sunday, rain or shine.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The magic's in the hole!

The largest collection of Indigenous Australian artifacts in the world, and the rare museum where wood-and-glass cabinets have trumped interactive exhibits.

A terrific purveyor of natural history objects and curios.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A fitting attraction for the corn capital of the world.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Dig for your own trilobites in this goldmine of invertebrates.

Largest collection of mounted dinosaur specimens in the world.

Clusters of huge boulders in the Australian Outback.

A massive metal lobster welcomes tourists to a roadside restaurant.

The Australian lorikeets that like to tie one on in an annual drinking binge.