The north building, originally constructed in 1926, houses a first-floor retail store and the Welcome Centre, Niagara's Fury, a whitewater simulation, plus the ticket offices for the tunnels Journey Behind the Falls attraction.

The south building, constructed in 1974, has a first-floor fast food snack bar, additional retail space, and a second-floor, semi-formal restaurant overlooking the Horseshoe Falls and the upper Niagara River.

[3] Since the 1840s, there had been a series of stairways leading from the complex to the river level where tourists could descend and walk right next to the foot of the Horseshoe Falls, dubbed Behind The Sheet.

The attraction, now called the Scenic Tunnels, continued to draw increased tourist traffic; so much so that in 1963, extensive renovations were made to Table Rock House.

Modifications included the addition of the second floor observation plaza, and a planned "permanent" exhibit of replicas of the Royal Crown Jewels of Britain, drawing over 330,000 people in its first year.

A major road design re-routed the Niagara Parkway to the west of the building in 1973, which provided a pedestrian environment between Table Rock House and the Horseshoe Falls.

[5] In 1974, the building known as Table Rock South or the annex, was constructed to expand retail space, including a second-floor, first-class restaurant.