For the first time there appeared an orchestra pit in front of the stage, sunk below ground level.
While most trolley cars shuttled along on street-level tracks, they sank below ground as they approached the congested city center.
After planting the end of the pole in a box that is sunk below ground level, the vaulter leaves the ground and pulls himself upward until he is almost doing a handstand on the pole.
A cafe-bar will be sunk below ground level, and there will be a basketball court on the roof, surrounded by metallic mesh fencing with the word "Basketbar" in painted capital letters.
First, the grass roof on our shed that has spluttered along for 14 years needed updating to keep us from having to water it and second, a water butt that I had sunk below ground when I built the garden, needed filling in to allay my fear of someone disappearing into it head first.
To reduce the height of the building, city officials said, the IMAX screen will be sunk below ground.
In the same vicinity, the freeway sinks below ground level in a trench; groundwater-retaining walls were installed to prevent the lowering of the water table in adjacent wetlands, therefore mitigating damage to them.
The lobby, executed in concrete, glass and aluminum panels, and topped by hanging fluorescent fixtures by the lighting designer Susan Tillotson, is sunk below ground, reached by a rather steep forecourt that slopes down from the street.
And in a dramatic innovation, two inner courtyards have been transformed into a single atrium by sinking them below ground level.
But if the menu was familiar, the outlet itself, a two-tier box sunk slightly below ground, but squatting on prime real estate on the main park walkway next to the stadium, was more of a surprise.
Kone believes it has the solution with its Tytyri facility in Finland, where it has an lift shaft sunk 333m below ground.
