Inkaterra Reserva Amazónica
Peru
This ecolodge is in one of the planet's most biodiverse regions. A Canopy Walk offers a window on the world of insects and birds (toucans and trogons), while on nearby Lake Sandoval, guests drift about in dugouts looking for giant otters, caimans, red howler monkeys, and side-necked turtles. The new Ena spa offers the Amazon Purification Treatment, a body mask and lymphatic-drainage massage using a cream derived from the local medicinal cat's claw plant (800-442-5042; inkaterra.com; doubles, $541$645).

Four Seasons Tented Camp Golden Triangle
Thailand
Guests come to this 15-tent hideaway to see one animal: the elephant. The hillside camp overlooking the Ruak River offers packages that include elephant driving and trekking through the jungle, as well as visits to hill tribes that now cultivate coffee beans instead of opium. Treatments at the open-air spa salas include the Mahout Recovery massage, which uses poultices of camphor, lime, and lemongrass to release lactic acid and soothe aching muscles (66-53-910-200; fourseasons.com; doubles, $3,984 for two nights, all-inclusive). Lisa Johnson