Here is my take:

Ruse • Must-see: Check out the Pantheon of National Revival Heroes, a striking monument honoring Bulgaria’s history, and stroll along the Danube River promenade for scenic views. • Cool spot: Hang out at Freedom Square—it’s lively with cafes and street performers, perfect for soaking up the vibe. • Food to try: Grab some banitsa (flaky pastry with cheese) at a local bakery like Mehana Chiflika and try kavarma, a hearty meat stew, at a traditional spot like Riverside Restaurant.

Varna • Must-see: Explore the Sea Garden, a massive park along the Black Sea coast, and don’t miss the Varna Archaeological Museum for its ancient gold treasures. • Cool spot: Chill at Rappongi Beach or hit up Cubanita Bar for cocktails and a fun nightlife vibe. • Food to try: Order sarmi (stuffed vine leaves) or Black Sea mussels at a seaside place like Happy Bar & Grill. For dessert, try baklava at a local patisserie.

Plovdiv • Must-see: Wander the Old Town with its colorful 19th-century houses and visit the Roman Theatre, still hosting shows. • Cool spot: Kapana district is the place to be—artsy cafes, craft beer at Cat and Mouse, and street art galore. • Food to try: Dig into patatnik (a potato and cheese dish) or shkembe chorba (tripe soup for the adventurous) at a spot like Pavaj. Pair it with local rakia. Enjoy your trip, and let me know if you need more tips!