What is the world's weirdest place? - 3

Disclosure: Some of them are creepy.

The Catacombs Of Paris:  Where the Empire of the Dead sleeps.
Not for the faint hearted, this attraction will stay with you forever. The solemn, chilly air can get to pretty much anyone, If it doesn’t get to you, you might be one of the slinking trespassers that so often creep out of the various hidey holes leading to this mass grave.

Recommended Visit: Warning before you go.

Door to Hell (Literally)
The Door to Hell is a natural gas field in Derweze, Turkmenistan that has been burning continuously since it was discovered in 1971.
Wiki: Door to Hell

Mütter Museum, Philadelphia
If you have the slightest morbid or macabre fascination with the human body, it’s diseases, deformities and strangeness – then this place is your haven.
Ref: Medical wonders in an architectural gem

Kelimutu Lake (Tri colour Lakes), Indonesia
Three crater lakes that are found atop the same volcanic peak but are of three entirely different colours.

Painted Dune, USA
Painted Dunes and the colourful effect is caused by the oxidation of volcanic ash.

Maunsell Sea Forts
Rising from the water like rusty invaders out of H.G. Wells, the Maunsell Army Forts in the Thames Estuary are decaying reminders of the darkest days of World War II.

Refer: Maunsell Army Sea Forts

Hill of Crosses
It has about 100 000 crosses. The Hill of crosses attracts people with it's peace, spirituality, authenticity and sacred nature.
Source: Hill of Crosses

Isla de las Muñecas (Island of the Dolls) in Mexico
It is dedicated to the lost soul of a poor girl who met her fate too soon in strange circumstances. 
More on Isla de las Muñecas (Island of the Dolls) in Mexico.

This Underground Town
Coober Pedy has evolved into one of the most unique places in Australia and perhaps the world. 
Ref: Page on sa.gov.au

Eternal flame falls orchard park new york
The mystery of New York's eternal flame: Baffled scientists admit they are unsure where the gas that keeps landmark burning comes from
Full coverage:  New York's eternal flame

The Hanging Pillar of Lepakshi Temple
It is said that the pillar is a bit dislodged from its original position when a British engineer tried to move it in an unsuccessful attempt to uncover the secret of its support.

The Train to Heaven in Wroclaw
Monument depicting an old, real steam locomotive standing upright and pointing towards the sky, located at Strzegomski Square in Wroclaw, Poland
Ref: The Train to Heaven in Wroclaw

‘Hope for Peace’ Monument in Yarze, Lebanon
The 5,000-ton imposing monument that resembles a shelled building rises 30 meters and contains as many as 78 vehicles.

The Wall of Tears, Galapagos Islands
The wall is about 25 m (65 ft) tall and is said to have been the cause of thousands of deaths during its construction.
Wiki: Wall of Tears (Galápagos Islands)

For more interesting places do check out my blog on Quora - Go Places.