The Arch of Sergius (also referred to as the Golden Gate of Pula) commemorates the Sergii, one of the most influential families in the early Roman colony. The arch stood behind the original naval gate of the city and was paid for by the wife of Lepidus, Salvia Postuma. Their names are carved in the stone along with Lucius Sergius and Gaius Sergius. In its original form, statues of the two elders flanked Lepidus on both sides on the top of the arch.

Inaugurated in 1890, the Arriaga Theatre is a Neo-baroque opera house named after the Bilbao-born composer Juan Crisóstomo de Arriaga, often referred to as the 'Spanish Mozart'. Inspired by the Paris Opera House, it became a key cultural venue in Bilbao. The original theatre burned down in 1914 and was rebuilt, reopening in 1919. Today, it hosts opera, ballet, classical concerts, and theatre productions. Guided tours give a behind-the-scenes look at the staircases, Royal Box, and costume collection.

The Guggenheim Museum Bilbao is a landmark of contemporary architecture and a cultural beacon for the city. Designed by Canadian-American architect Frank Gehry, the museum's fluid, sculptural form has been hailed as one of the most significant architectural achievements of the 20th century. Its titanium-clad curves and organic shapes have transformed the Bilbao skyline and are often likened to a ship or flower. Beyond its jaw-dropping exterior, the museum houses a world-class collection of modern and contemporary art, focusing on postwar American and European artists. Notable works include pieces by Mark Rothko, Jeff Koons, and Louise Bourgeois, among others.

The Freedom Monument, or "Milda" (as the locals call it), towers gracefully between the Old Town and the city. The 42-metre-tall statue is a symbol of Latvia’s freedom and independence. The honour guard changes shifts every hour, on the hour, from morning until evening.