The patron of this extravagant Art Nouveau confection insisted that nothing less than a boat should project from its facade.

Dedicated to the untimely death of American balloonist and parachutist.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

In the waters outside Helsinki, a tiny island once used as a military outpost now welcomes visitors.

Atop this library is one of the most beautiful green spaces in Warsaw.

Walk along the medieval fortifications that have been protecting Tallinn since the 14th century.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

One of Jeff Koons’s largest sculptures and his first commemorative work.

This now-defunct synthetic fuel plant was once a major cog in the Nazi war machine.

One of the largest refracting telescopes in the world, and the first built specifically for studying astrophysics.

A medieval setting reimagined into a unique art alley.

Built in the Soviet era, this cableway system still runs gondolas from Odessa down to Otrada Beach.

An exquisite Baroque church in Vienna's old town.

A unique sculpture calls the outside of this steakhouse home.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

Designed as a reminder of one of the darkest moments in Austrian history.

This former insane asylum now holds a pathological anatomy museum.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

Designed to resemble foreign architecture, this mosque-looking structure was used to pump water to a royal fountain.

A six-story, asymmetrical tower filled to the brim with scientific experiments.

A fortified palace in the shape of a ship on the Thiou river.

A much-loved sculpture depicting the hero of a 1956 anti-Soviet uprising.

Prayers and messages of hope decorate the ceramic tiles of this pavilion.