"Future home of Moynihan Station" reads a billboard that has sat for years on the main entrance staircase, heralding long-stagnant promises for a massive Amtrak main terminal, with ticketing and waiting areas, plus retail shops.

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Ms Jiricna's eye-popping, blue-lit, glass spiral staircase connects the main hall with a new mezzanine floor.

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Beneath the two passenger decks of this modified super jumbo is an Air Force One-style air-stair -- allowing access to the tarmac without the need for a sky-bridge or external staircase -- and a crew dining area, crew gallery, crew bathroom, sleeping quarters for eight on bunk beds, a communications room and spiral staircase leading to the main deck.

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Beyond, the main entry hall contained an immense ceremonial staircase flanked by formal portraits in extravagant gilded frames.

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From a broad street-level plaza, a grand staircase leads down to the museum's main entrance, while another connects the plaza with the river.

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