This rest area is called the SeaTac Rest Area but it is actually located in Federal Way south of SeaTac city limits. Unlike other rest areas on Interstate 5, there is no corresponding southbound rest area.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/places/rest-areas/seatac-rest-area/seatac-rest-area.md
When x = π, Euler’s formula may be rewritten as eiπ + 1 = 0 or eiπ = −1, which is known as Euler’s identity.