Which has more total thermal energy: a glass of water or a pool?

There is a difference between energy and temperature. You can have a swimming pool and a beaker of water at exactly the same temperature. Even though they are at the same temperature the swimming pool represents a much bigger thermal energy store than the beaker of water.

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."