Unable to answer "Does this crosswalk have tactile pavings on both sides?" for node/3146108386 via StreetComplete 39.1:

Not a crosswalk

node/2336725339

is it an actual active place of worship?

rail trail

"I walked down to where it supposedly is and there is just a sidewalk and a hillside."
The place has gone or never existed. A user of Organic Maps application has reported that the POI was visible on the map (see snapshot date below), but was not found on the ground.
OSM snapshot date: 2024-02-02T13:20:04Z
POI name: Red Ash Mine
POI types: landuse-quarry
#organicmaps android

Playground

via StreetComplete 55.1

Attached photo(s):
https://westnordost.de/p/200695.jpg

Conscience Hill is owned by MIT and hiking is allowed. But intervening parcel between MIT land and Timberlake Conservation property is private.
Private land extends SSE roughly parallel to Timberlake parcel from town line, through this point, to Keyes road.

The note indicates this is where the road ends. It does not continue to Jackson Street/Hwy 29 N..

Here is something tagged with emergency_service=technical. This tag is deprecated. What is this object?

way/244247185

According to the signs, this bike trail is called "Big Woods Regional Trail" not "Scott West"

via StreetComplete 56.1

Attached photo(s):
https://westnordost.de/p/199296.jpg

"It's a factory/manufacturer, not a trash bin, lol.
24/5 are the hrs (no weekends). parking is all around the building."
OSM snapshot date: 2023-08-14T02:00:17Z
POI has no name
POI types: amenity-waste_basket
#organicmaps android