Underwater roads undetectable from the surface used for escape routes from foreign invaders.

The first museum dedicated to exploring humanity's cultural relationship with the celestial world.

The pyramid and dome deep inside the Dzūkija forest are believed to channel divine energy.

Open-air museum with a large collection of Soviet-era statues.

Once known throughout Europe, this tiny and unusually progressive 18th century micro-nation within Lithuania now lies in ruins.

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

A creepy statue of a hooded ghost hauls itself up from the water in a historic Lithuanian city.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

The reconstruction of this prominent building fulfilled a long-written command.

Every winter, this former planetarium is transformed into a massive, brightly-lit Christmas ornament.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

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

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A dozen cast iron leopards stand guard along the length of Aberdeen's Union Bridge.

Designed to allow funerals to proceed over the River Dulnain.

Cut into a sheer cliff face, these stairs are the only way to reach a secluded Scottish harbor.