In a dense band of clinics and hospital campuses up the San Francisco Peninsula, Palo Alto, CA sits among some of the region's busiest sites. Outpatient MRI, ultrasound, and rehab centers thread through the surrounding towns. US-101 and I-280 run parallel down the Peninsula. El Camino Real links the towns in between, from Menlo Park just north to Mountain View south. Housing here runs very expensive, so travelers frequently commute in from farther down the Peninsula or across the bay, with Caltrain easing some of the drive. Stanford's campus and the Dish loop trail sit close by for a walk when the calendar clears. The corridor's appointment books run full from the first slot of the day to the last.