Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Designed to commemorate the king's coronation.

An old Danish political institution where members of government can grab a drink off the record.

Site of the first radio and telephone broadcasting companies in Copenhagen.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Tiny silver and copper fish set inside blue-green lights are like windows to the underwater world.

A world-class collection of mechanical musical instruments and automata.

This Hindu temple in suburban New Jersey is the largest in the United States and one of the largest in the world.

This 150-year-old train station and caboose have been turned into a railroad museum, enjoyed by young and old alike.

The 570-ton boulder that gave a New Jersey town its name.

After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

This monument is dedicated to Balto, the heroic Alaskan sled dog.

Wooden pavers represent a 17th-century barrier that gave Wall Street its name.

A wooden rollercoaster that still delivers a thrill.

With a history dating back to Victorian times, this architectural gem is a rare New York tourist haunt worth visiting.

The graffiti that birthed modern algebra.

Collection of still-functioning printing presses from the 18th to 20th centuries.

Outside an Irish football stadium are murals commemorating history and local heroes.

This is the place where U2’s lead singer got his nickname.

Turntable anonymously received orphans, alms, and groceries.

This fountain was designed to honor the man who helped bring water to Barcelona.

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.