This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

This strange sculpture of a menacing skull surrounded by sun rays was discovered at the foot of the Pyramid of the Sun.

The only castle in North America to ever house European sovereigns.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Take in a sweeping views of Guanajuato—and save yourself a hike up a steep hill—on this funicular.

A Mexican Romeo-and-Juliet-esque legend has given this super-narrow alleyway a reputation for romance.

The eerie burnt-out remains of a prominent building where 30 protestors lost their lives.

These traffic lights celebrate the 100 year anniversary of the women's suffrage movement in Lithuania.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

The oldest housing complex in Riga is a mini timeline of architectural trends.

Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

3,000 market stands in five former Zeppelin hangars.

Legend says lovers who hold hands while venturing along this stone jetty and kiss at the end will remain together forever.

The Guardian of Tallinn.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

While the U.S. and Soviet Union were engaged in a space race, Poland built a UFO on the ground.

Gliwice Radio Tower, likely the tallest wooden structure in the world.

Brought to you by the makers of fiberglass dinosaurs.

This Communist-era residential block is one of the longest residential building in Europe.

Modern art commemorates one of the first military actions of World War II.

This antique thermometer honors the creator of the first universal temperature scale.

A merchant court dedicated to the fictitious King Arthur is heavily adorned with bizarre Renaissance art.

These rare statues are one of the few remaining material witnesses to Old Prussian culture.