Start south in Tulum, fly into Cancún, grab the ADO bus or a collectivo, 90 minutes, palm trees flashing past. Check into a beach cabana, thatch roof, sand floor, solar lantern glow. Wake with the waves, yoga on the sand, instructor chants in Spanish, sun salutations synced to tide. Breakfast: chia bowls, pitaya sliced like rubies, coffee strong enough to wake the dead. Rent a bike, pedal the jungle road to the ruins, enter before 9 am, climb the castle pyramid, Caribbean wind whips hair, iguanas sunbathe on stones. Below, the beach stretches, seaweed piles sometimes but raked by noon.

Afternoon, chase cenotes. Gran Cenote first, turquoise pool, stalactites drip, snorkel with baby turtles. Deeper in, Casa Cenote, mangrove tunnel opens to lagoon, tarpon glide under your kayak. Bring water shoes, rocks sharp. Sunset, hit the beach bars, mezcal cocktails, fire dancers spin, drums echo off cliffs.

Night bus or drive 45 minutes north to Playa del Carmen. Fifth Avenue pulses, street performers juggle fire, taco stands smoke carnitas. Grab a corner table, order pastor tacos, pineapple spinning, salsa verde that bites back. Bars spill mariachi into techno, pick your poison. Rooftop clubs open 11 pm, breeze off the ferry dock cools the dance floor. Sleep late, recover with ceviche on the beach, lime cures everything.

Day three, ancient trails. Rent a car, head to Coba at opening, 6 am quiet. Rent a bike at the gate, pedal 5 km through jungle, howler monkeys roar overhead. Climb Nohoch Mul pyramid, 42 m, 120 steps, view over green sea of trees, lakes glint like coins. Sweat pours, but the top breeze is worth it. Lunch in the village, sopa de lima, chicken broth tangy with local limes.

Side quest: Punta Laguna, spider monkey reserve, zip line over lagoon, canoe with the guide, he points crocs sunning on logs. Quiet, no crowds, sun filters through canopy in gold shafts.

Food hacks everywhere. Street corners, marquesitas, crepes rolled with cheese and Nutella, crunch like addiction. Mercado in Playa, pick a stool, order pan de cazón, shark layered with beans, tortilla stack heaven. Michelada with Clamato if hair of the dog calls.

Stay mix: Tulum eco cabins, outdoor showers, mosquito nets romantic. Playa boutique hotels, rooftop plunges, walk to everything. Coba area glamping, tents with AC, jungle sounds lullaby.

Sun rules: rash guard for cenotes, hat for ruins, aftersun with local honey. Rainy pops June to October, 20 minute storms, then steam rises, colors pop harder. December to April dry, sargasso sometimes piles, hotels rake, swim north ends.