Soviet monument looks like UFO

The Buzludzha monument near Kazanluk, Bulgaria looks like a UFO that's been decaying for centuries, but it's actually only 36 years old.

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The former House Monument of the Bulgarian Communist Party was completed in 1981 but has stood abandoned since the government's fall from power eight years later.

The centrepiece of the hall is the communist hammer and sickle encircled by a quote from the Communist Manifesto.

The building is now closed off to the public as it is considered dangerous - though some bold travellers have managed to take a peek inside.

TripAdvisor's best landmarks in the world 2017
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TripAdvisor's best landmarks in the world 2017
"Simultaneously eerie and majestic and in miraculous condition. A truly memorable experience, like absolutely nothing else I've ever seen."

"Grand is an understatement. The architecture, the white marble and the beautifully maintained green gardens are stunning."

"The Mezquita is a stunning architectural masterpiece with the haunting columns and arches of the old mosque juxtaposed with the ornate decoration of the opulent cathedral at its centre."

"When you walk into the dome and the light shines through the windows and catches all of the gold, the building begins to glow."

"Simply the greatest architectural achievement on earth, not to mention a testament to love. You haven't lived until you've visited, so don't put it off one minute longer."
"The whole church is a piece of art. So colorful outside and even more impressive inside, with mosaics covering every inch."
"The crowds were sparse, the countryside green and lush and the views of the wall were amazing. Worth every moment!"
"We rounded a wall, and there before me was the city laid out in all its splendor, shining in the bright sun. It was all I had hoped for."
"This is one place you must see the expanse Palace of the Spanish Plaza is an artists dream with all the tile work and fountains."
"What a spectacular cathedral. The inside is impressive and the rooftop makes this a must see."

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