A week off work means a week down south, and a very warm one at that. Texas in the summer is hot hot hot, and also not very crowded. (Bonus!) I've been explaining the experience to people as "it's like you just opened the pre-heated oven door, except that's the door to the street." Fortunately, the A/C is blasting all day every day, so a cool escape is always near.
Let's start off with the San José Mission in San Antonio. There are five Spanish Missions of Old San Antonio scattered along the San Antonio River. These establishments were built by Spanish Catholic religious orders who trained the native peoples to cultivate the land and adopt new culture, in order to live sustainably and prosper. These sites were built in 1720 (The Alamo) and 1731 (San José, San Juan, Concepcion and Espada). The missions are free UNESCO World Heritage Sites which still run as active parishes. When it isn't 100°F I'd totally do a bike tour of the four latter missions.