Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Ice cream stand, snack bar, and time capsule of milk conveyance.

Several times a year, during low tide, two pairs of historic train tracks are revealed on this New Jersey beach.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A multiversal transit station located right below a highway interchange.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

The facade of this relic from the Klondike gold rush is decorated with over 8,800 pieces of driftwood.

Originally a brothel during the Klondike Gold Rush, this bar once used dolls to denote when ladies were working.

A historic freight system that found the true gold rush is in tourism.

A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

A beautiful but toxic fountain of mercury.

An early 20th-century bullring converted into a modern shopping center.