A pair of connected skyscrapers form this symbolic gateway.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

Structure built from the skulls of vanquished foes.

A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

A centuries-old forgotten underworld lies beneath Malta.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

This unique building in the main square stands out among the city's typically Baroque architecture.

This exceptionally well-preserved ancient marvel also houses a small museum dedicated to Jordanian folk tradition.

Inside the dome of this gigantic, Saturn-shaped building is one of the largest planetariums in Asia.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

The site of an atrocity that would be used to justify Britain’s conquest of India.

Known as the Sistine Chapel of Egypt, this tomb houses some of the most well-preserved paintings in Egypt.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

The former stronghold of the Malla Dynasty has remained virtually unchanged since the 17th century.

The beautiful 16th-century stepwell lies in the shadow of a famous fortress.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

Nearly three decades since the fall of the Soviet Union, the hero of the USSR still stands over Belarus.

Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

This ancient cave temple complex is the largest and best-preserved temple complex in Sri Lanka.