The gilded, masterful astronomical clock will calculate time, dates, and planetary positions for thousands of years to come.

Copenhagen's celebrated theme park and gardens.

A narrow strip of land is home to the tallest migrating dunes in Europe.

Hear the quietest sound from across the dome.

The walls of the iconic dome are hollow and have a secret stairway.

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

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.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

Home to more than 13,000 pieces of war memorabilia and military equipment.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The magic's in the hole!

This public art piece proves that in Portland even reporting the weather is a thing of whimsy.

Two plaques commemorate the site of Shakespeare's first theatre.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

For one day every month Barcelona's Estació de França transforms into a market for model trains.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

Two thousand artifacts from around the world collected by one woman who loved to travel.

London's smallest police station is barely the size of a phone booth.

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.