Date: 201912
Local time of day: 1201-1800
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: B737-700
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Flight phase: Initial Approach
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Not Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP)
Anomaly: Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Inflight Event / Encounter CFTT / CFIT
Detector: Automation Aircraft Terrain Warning
When detected: In-flight
Result: Flight Crew Took Evasive Action; Flight Crew Executed Go Around / Missed Approach
Contributing factors: Human Factors; Environment - Non Weather Related
Primary problem: Ambiguous

Narrative: On descent the Crew was given a 350 heading and a descent to 2;000 feet. The Pilot Flying put 1;200 feet in the altitude window but was corrected by the Pilot Monitoring. ATC asked if the field was in sight and cleared the Crew visual to Runway XX. The Pilot Flying dialed in 1;200 feet in the altitude window and began a descent on approximately a 90 degree left base for Runway XX. The Crew was directed to contact Tower and the Pilot Monitoring went heads down to put in the frequency. When the Pilot Monitoring came back heads up; the GPWS caution sounded with a yellow blob below point ZZZZZ. ATC also said they received an altitude alert at that time.The Pilot Flying initiated a climb until the caution disappeared and re-initiated the visual approach; but was too high to make a safe descent to land with the glare from the sun behind the airport; due to the time of day washing out the VASIs. The Crew initiated the go-around at approximately 1;000 feet and was given instructions by Tower to fly runway heading and climb to 2;000 feet. The Pilot Flying called for flaps 15 and landing gear up followed by set speed. The Pilot Monitoring saw the window was closed and checked climbout speed; and the Pilot Flying called set speed again.The Pilot Monitoring asked if he wanted flaps 1 since the speed was good and the window was closed. The Pilot Flying called for flaps 1 and set speed again with the window closed; and the Pilot Monitoring asked if he would like flaps up once the airspeed passed the 1 bug. The Pilot Monitoring was trying to call ATC at the same time; but put in the incorrect frequency issued by Tower for the go and had to query Tower for the correct frequency. During that time the Pilot Flying began a turn to follow the published missed approach and the Pilot Monitoring intervened with a direction to fly runway heading. Once stable at 2;000 feet and runway heading; ATC issued new vectors for the Crew to bring the aircraft back around to land.Continued vigilance of obstacles in the approach path such as the tower below the outer marker on this approach. It was not a controlling obstacle and it is difficult to see since it's depicted underneath the final approach course on the chart.




Synopsis: B737 First Officer reported a GPWS warning on final; resulting in a go-around.